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Tank T4C Stainless Steel 50mm Waterproof Smartwatch with Heart Rate Monitor Black M/L
Smartwatches

Tank T4C Stainless Steel 50mm Waterproof Smartwatch with Heart Rate Monitor Black M/L

The The Kospet Tank T4C is a smartwatch with a touchscreen that can be connected to a mobile (smartphone) Android or iOS. It is mainly aimed at those interested in a smartwatch with multiple functions and capabilities for monitoring their health and physical condition. It can be used for swimming in the pool και between its capabilities, it stands out for... See full description

  • Protection: Splash Resistant, Dust Resistant, Scratch Resistant
  • Features & Functions: Caller ID, Application / Calls Notification
  • Features: Vibration, Speaker, Microphone
  • Sensors: GPS, Altimeter, Gyroscope, Heart Rate, Oximeter, Sleep Monitoring, Compass
112 51 €
Delivery Thu, 12 Nov - Mon, 16 Nov
14,00 €   shipping cost
Sent from Greece
From Shop404 5.0 (9)
5.0 (9 reviews)
Greece
5+ pieces
See Wearables on the page of Shop404

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Product report

Description

Description

The The Kospet Tank T4C is a smartwatch with a touchscreen that can be connected to a mobile (smartphone) Android or iOS. It is mainly aimed at those interested in a smartwatch with multiple functions and capabilities for monitoring their health and physical condition. It can be used for swimming in the pool και between its capabilities, it stands out for its GPS and built-in heart rate monitor.
With the heart rate monitor, the Tank T4C will be able to accurately detect your heart rate 24 hours a day and identify even small changes, knowing each of your heartbeats well. Additionally, GPS allows for satellite-based tracking of your geographical position, so you can accurately monitor your route.
Its waterproofing allows you to temporarily submerge it underwater. You can shower or swim in a pool without worry. * It is not fully waterproof, so it is not recommended for diving or swimming.
Finally, it can be used in various activities such as running, cycling, swimming, and hiking as it has pre-loaded sports profiles, each of which includes specialized measurements and indicators.

  • Protection: Splash Resistant, Dust Resistant, Scratch Resistant
  • Features & Functions: Caller ID, Application / Calls Notification
  • Features: Vibration, Speaker, Microphone
  • Sensors: GPS, Altimeter, Gyroscope, Heart Rate, Oximeter, Sleep Monitoring, Compass

Manufacturer

Manufacturer Details

Warnings & Safety Information
See full description

Specifications

Specifications

Technical Specifications

Colour
Black
Release Date
2025
Screen Size
1.5 "

Screen Size

"The design and size of the casing affect how each screen size appears on the wrist. Most smartwatches have screens of 1.4-1.5 inches."
Screen Resolution
466x466 pixels
Screen Type
AMOLED

Screen Type

AMOLED

Advanced OLED screen type with better visual experience, almost perfect black performance, thin and light but with higher energy consumption than Super AMOLED.
Compatible Operating System
Android, iOS

Compatible Operating System

The smartphone must be compatible with the watch. Apple Watches only connect with iPhones, while some others can connect with both Android and iPhones, but some functions may not be fully supported.
Touch Screen
Yes
Internal Storage
1 GB

Internal Storage

The amount of information that can be stored on a smartwatch. Most modern smartwatches have a capacity of 32GB, while older or simpler smartwatches may have 4GB of internal memory. This space is mainly used for storing applications. It is particularly useful for smartwatches that can be used independently of a mobile phone, for example, for storing and playing music.
Connection
Bluetooth

Connection

Bluetooth
The basic way to connect your smartwatch to your mobile phone and other supported devices, such as wireless headphones.
Strap
Silicone
Case material
Stainless Steel

Case material

Stainless Steel
"The most popular material for constructing a case is more resistant to rust, impacts, and scratches compared to others, but with greater weight."

Features & Functions

Features
Vibration, Speaker, Microphone

Features

Speaker

Playback of multimedia, notification sounds, or voice.

Microphone
For voice commands or speech.
Features & Functions
Caller ID, Application / Calls Notification

Features & Functions

Caller ID

The smartwatch can display the name of the contact who is calling.

Application / Calls Notification

The smartwatch has the ability to transfer notifications from our mobile phone applications such as receiving SMS, Email or a notification from a social media application. Depending on the smartwatch, we may also be able to read it directly from it.
Use
Misc Sports / Gym, Swimming, Climbing, Hiking, Cycling, Running

Use

The smartwatch has the ability to record the corresponding activity and produce relevant statistics.

Additional Specifications

Sensors
GPS, Altimeter, Gyroscope, Heart Rate, Oximeter, Sleep Monitoring, Compass

Sensors

GPS
Technology that allows for the detection of geographic location via satellite. Particularly useful for navigation through map applications such as Google Maps.
Altimeter
Like a barometer, an altimeter measures atmospheric pressure by translating it into altitude, aiding in faster GPS location detection for navigation applications, as well as tracking how many floors we have climbed for health applications.
Gyroscope
A sensor that helps the device know its position in space. For example, it allows the device to understand when we turn our wrist to look at the screen.
Heart Rate

Embedded heart rate monitor.

Oximeter

Measure the amount of oxygen in the blood.

Sleep Monitoring

Recording of heart rate and breathing during sleep and diagnosis of problems according to the product. (e.g. restless sleep, lack of deep sleep, etc.)

Compass
Updates our device with its orientation, assisting in the use of navigation applications such as Google Maps.
Protection
Splash Resistant, Dust Resistant, Scratch Resistant
ATM Rating
5 ATM

ATM Rating

The ATM rating on smartwatches indicates their level of water resistance, which tells how well the watch can withstand exposure to water and various pressure levels.

3 ATM (30 meters): Suitable for everyday splashes, rain, and hand washing.

5 ATM (50 meters): Light swimming, showering.

10 ATM (100 meters): Swimming, snorkeling, water sports.

15 ATM (150 meters): Advanced swimming, water sports.

20 ATM (200 meters): Diving, deep water activities.

50 ATM (500 meters): Professional diving, excellent water resistance.
Waterproof
Pool Swimming

Waterproof

Pool Swimming

Equipped with a high level of waterproofing, the smartwatch can be comfortably used during pool swimming. Track your performance in the water without worrying about the safety of the device.
MIL-STD-810
Yes

Battery

Battery Capacity
500 mAh

Battery Capacity

Most smartwatches have a battery capacity of around 200mAh. 2. The size of the battery is not always indicative of the autonomy, as this largely depends on the features of the smartwatch and the functions we have active. 3. For example, a smartwatch with a large color touch screen and 24-hour heart rate monitoring will often require charging even if it has a larger battery than a simpler smartwatch.
Battery Life
16 days

Battery Life

Battery life shows how many days the smartwatch can operate without charging.


It depends on the battery capacity, but also on how much you use it (e.g. active display, GPS, notifications, etc.).


For example, a smartwatch with 2-3 days of battery life is ideal for daily use with all features enabled.


Models with 5–10 days or more are suitable for those who do not want to charge often or use it more "lightly".


The value is especially meaningful when comparing products from the same manufacturer.

Dimensions

Case Size
50 mm

Case Size

50
This size is usually intended for fruits with a circumference of over 20.5cm.
Weight
60.7 gr

AI Features

AI Voice Assistant
No
AI Training Coach
No
AI Health Insights
No

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

See all specifications

Reviews (7)

Reviews

4.4
7
4.4
Review this product
  1. 6
  2. 4 stars
    0
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1
Review this product

What do users say? AI-generated summary

Users rate the watch positively, highlighting its good battery life and reliable health tracking. They also mention its durable build, wide range of watch faces, and workout programs.

Reviews by our members

  • miltosx
    5
    miltosx

    Verified purchase

    Its quality is very good, except for the strap, which seems to be of lower quality. With normal use, the battery lasts close to a week. You need to keep the app open so it doesn’t disconnect from the phone! Nice, with lots of watch faces! Lots of workout programs; the biometrics work very well and are fairly accurate in their measurements.

    Translated from Greek ·
    Did you find this review helpful?
  • Chi3ftain
    5
    Chi3ftain

    Verified purchase

    Perhaps the best-value smartwatch on the market. An incredible device. Strong support, continuous updates to skins and interface. Easy to use. The reasons I chose it were: 1. blood oxygen measurement 2. barometer with GPS 3. heart rate. Impressive watch—fantastic price (€120). Extremely durable. Long-lasting battery.

    Translated from Greek ·
    Did you find this review helpful?
  • Petros_Zis
    5
    1 out of 1 members found this review helpful
    Petros_Zis

    Verified purchase

    The best thing out there!! You can’t find this kind of quality for 120 euros.. battery lasts 10 days easily, it’s excellent in the water, and best of all, you can knock it around left and right and nothing shows on the watch.. And as for the size, don’t let anything put you off—it’s just right and lightweight on the wrist.

    Translated from Greek ·
    Did you find this review helpful?
  • Eldir13
    5
    3 out of 3 members found this review helpful
    Eldir13

    Verified purchase

    Overall, I was pleasantly surprised.... because I have other Kospet watches, I knew their quality... but now the new T4 and T4C have stepped up a level...
    The app is very good and has quite a few watchfaces.... The measurements are excellent... compared to the Huawei Watch 4 Pro Space Edition...
    As soon as I saw it on Skroutz at a price cheaper than the China price... I couldn't resist....

    Translated from Greek ·
    Did you find this review helpful?
  • 1
    3 out of 3 members found this review helpful
    kalergism

    Verified purchase

    It broke in the third week, what a shame! Stay away

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    starserif

    Verified purchase

  • 5
    george6497

    Verified purchase

  • miltosx
    5
    miltosx

    Its quality is very good, except for the strap, which seems to be of lower quality. With normal use, the battery lasts close to a week. You need to keep the app open so it doesn’t disconnect from the phone! Nice, with lots of watch faces! Lots of workout programs; the biometrics work very well and are fairly accurate in their measurements.

    Translated from Greek ·
    0
  • Chi3ftain
    5
    Chi3ftain

    Perhaps the best-value smartwatch on the market. An incredible device. Strong support, continuous updates to skins and interface. Easy to use. The reasons I chose it were: 1. blood oxygen measurement 2. barometer with GPS 3. heart rate. Impressive watch—fantastic price (€120). Extremely durable. Long-lasting battery.

    Translated from Greek ·
    0
  • Petros_Zis
    5
    Petros_Zis

    The best thing out there!! You can’t find this kind of quality for 120 euros.. battery lasts 10 days easily, it’s excellent in the water, and best of all, you can knock it around left and right and nothing shows on the watch.. And as for the size, don’t let anything put you off—it’s just right and lightweight on the wrist.

    Translated from Greek ·
    1
  • Eldir13
    5
    Eldir13

    Overall, I was pleasantly surprised.... because I have other Kospet watches, I knew their quality... but now the new T4 and T4C have stepped up a level...
    The app is very good and has quite a few watchfaces.... The measurements are excellent... compared to the Huawei Watch 4 Pro Space Edition...
    As soon as I saw it on Skroutz at a price cheaper than the China price... I couldn't resist....

    Translated from Greek ·
    3
  • 1
    kalergism

    It broke in the third week, what a shame! Stay away

    Translated from Greek ·
    3
  • See all

Description & Specifications

The The Kospet Tank T4C is a smartwatch with a touchscreen that can be connected to a mobile (smartphone) Android or iOS. It is mainly aimed at those interested in a smartwatch with multiple functions and capabilities for monitoring their health and physical condition. It can be used for swimming in the pool και between its capabilities, it stands out for its GPS and built-in heart rate monitor.
With the heart rate monitor, the Tank T4C will be able to accurately detect your heart rate 24 hours a day and identify even small changes, knowing each of your heartbeats well. Additionally, GPS allows for satellite-based tracking of your geographical position, so you can accurately monitor your route.
Its waterproofing allows you to temporarily submerge it underwater. You can shower or swim in a pool without worry. * It is not fully waterproof, so it is not recommended for diving or swimming.
Finally, it can be used in various activities such as running, cycling, swimming, and hiking as it has pre-loaded sports profiles, each of which includes specialized measurements and indicators.

  • Protection: Splash Resistant, Dust Resistant, Scratch Resistant
  • Features & Functions: Caller ID, Application / Calls Notification
  • Features: Vibration, Speaker, Microphone
  • Sensors: GPS, Altimeter, Gyroscope, Heart Rate, Oximeter, Sleep Monitoring, Compass

Manufacturer

Manufacturer Details

Warnings & Safety Information

Technical Specifications

Colour
Black
Release Date
2025
Screen Size
1.5 "

Screen Size

"The design and size of the casing affect how each screen size appears on the wrist. Most smartwatches have screens of 1.4-1.5 inches."
Screen Resolution
466x466 pixels
Screen Type
AMOLED

Screen Type

AMOLED

Advanced OLED screen type with better visual experience, almost perfect black performance, thin and light but with higher energy consumption than Super AMOLED.
Compatible Operating System
Android, iOS

Compatible Operating System

The smartphone must be compatible with the watch. Apple Watches only connect with iPhones, while some others can connect with both Android and iPhones, but some functions may not be fully supported.
Touch Screen
Yes
Internal Storage
1 GB

Internal Storage

The amount of information that can be stored on a smartwatch. Most modern smartwatches have a capacity of 32GB, while older or simpler smartwatches may have 4GB of internal memory. This space is mainly used for storing applications. It is particularly useful for smartwatches that can be used independently of a mobile phone, for example, for storing and playing music.
Connection
Bluetooth

Connection

Bluetooth
The basic way to connect your smartwatch to your mobile phone and other supported devices, such as wireless headphones.
Strap
Silicone
Case material
Stainless Steel

Case material

Stainless Steel
"The most popular material for constructing a case is more resistant to rust, impacts, and scratches compared to others, but with greater weight."

Features & Functions

Features
Vibration, Speaker, Microphone

Features

Speaker

Playback of multimedia, notification sounds, or voice.

Microphone
For voice commands or speech.
Features & Functions
Caller ID, Application / Calls Notification

Features & Functions

Caller ID

The smartwatch can display the name of the contact who is calling.

Application / Calls Notification

The smartwatch has the ability to transfer notifications from our mobile phone applications such as receiving SMS, Email or a notification from a social media application. Depending on the smartwatch, we may also be able to read it directly from it.
Use
Misc Sports / Gym, Swimming, Climbing, Hiking, Cycling, Running

Use

The smartwatch has the ability to record the corresponding activity and produce relevant statistics.

Additional Specifications

Sensors
GPS, Altimeter, Gyroscope, Heart Rate, Oximeter, Sleep Monitoring, Compass

Sensors

GPS
Technology that allows for the detection of geographic location via satellite. Particularly useful for navigation through map applications such as Google Maps.
Altimeter
Like a barometer, an altimeter measures atmospheric pressure by translating it into altitude, aiding in faster GPS location detection for navigation applications, as well as tracking how many floors we have climbed for health applications.
Gyroscope
A sensor that helps the device know its position in space. For example, it allows the device to understand when we turn our wrist to look at the screen.
Heart Rate

Embedded heart rate monitor.

Oximeter

Measure the amount of oxygen in the blood.

Sleep Monitoring

Recording of heart rate and breathing during sleep and diagnosis of problems according to the product. (e.g. restless sleep, lack of deep sleep, etc.)

Compass
Updates our device with its orientation, assisting in the use of navigation applications such as Google Maps.
Protection
Splash Resistant, Dust Resistant, Scratch Resistant
ATM Rating
5 ATM

ATM Rating

The ATM rating on smartwatches indicates their level of water resistance, which tells how well the watch can withstand exposure to water and various pressure levels.

3 ATM (30 meters): Suitable for everyday splashes, rain, and hand washing.

5 ATM (50 meters): Light swimming, showering.

10 ATM (100 meters): Swimming, snorkeling, water sports.

15 ATM (150 meters): Advanced swimming, water sports.

20 ATM (200 meters): Diving, deep water activities.

50 ATM (500 meters): Professional diving, excellent water resistance.
Waterproof
Pool Swimming

Waterproof

Pool Swimming

Equipped with a high level of waterproofing, the smartwatch can be comfortably used during pool swimming. Track your performance in the water without worrying about the safety of the device.
MIL-STD-810
Yes

Battery

Battery Capacity
500 mAh

Battery Capacity

Most smartwatches have a battery capacity of around 200mAh. 2. The size of the battery is not always indicative of the autonomy, as this largely depends on the features of the smartwatch and the functions we have active. 3. For example, a smartwatch with a large color touch screen and 24-hour heart rate monitoring will often require charging even if it has a larger battery than a simpler smartwatch.
Battery Life
16 days

Battery Life

Battery life shows how many days the smartwatch can operate without charging.


It depends on the battery capacity, but also on how much you use it (e.g. active display, GPS, notifications, etc.).


For example, a smartwatch with 2-3 days of battery life is ideal for daily use with all features enabled.


Models with 5–10 days or more are suitable for those who do not want to charge often or use it more "lightly".


The value is especially meaningful when comparing products from the same manufacturer.

Dimensions

Case Size
50 mm

Case Size

50
This size is usually intended for fruits with a circumference of over 20.5cm.
Weight
60.7 gr

AI Features

AI Voice Assistant
No
AI Training Coach
No
AI Health Insights
No

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews (7)

4.4
7
4.4
Review this product
  1. 6
  2. 4 stars
    0
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1
Review this product

What do users say? AI-generated summary

Users rate the watch positively, highlighting its good battery life and reliable health tracking. They also mention its durable build, wide range of watch faces, and workout programs.

Reviews by our members

  • miltosx
    5
    miltosx

    Verified purchase

    Its quality is very good, except for the strap, which seems to be of lower quality. With normal use, the battery lasts close to a week. You need to keep the app open so it doesn’t disconnect from the phone! Nice, with lots of watch faces! Lots of workout programs; the biometrics work very well and are fairly accurate in their measurements.

    Translated from Greek ·
    Did you find this review helpful?
  • Chi3ftain
    5
    Chi3ftain

    Verified purchase

    Perhaps the best-value smartwatch on the market. An incredible device. Strong support, continuous updates to skins and interface. Easy to use. The reasons I chose it were: 1. blood oxygen measurement 2. barometer with GPS 3. heart rate. Impressive watch—fantastic price (€120). Extremely durable. Long-lasting battery.

    Translated from Greek ·
    Did you find this review helpful?
  • Petros_Zis
    5
    1 out of 1 members found this review helpful
    Petros_Zis

    Verified purchase

    The best thing out there!! You can’t find this kind of quality for 120 euros.. battery lasts 10 days easily, it’s excellent in the water, and best of all, you can knock it around left and right and nothing shows on the watch.. And as for the size, don’t let anything put you off—it’s just right and lightweight on the wrist.

    Translated from Greek ·
    Did you find this review helpful?
  • Eldir13
    5
    3 out of 3 members found this review helpful
    Eldir13

    Verified purchase

    Overall, I was pleasantly surprised.... because I have other Kospet watches, I knew their quality... but now the new T4 and T4C have stepped up a level...
    The app is very good and has quite a few watchfaces.... The measurements are excellent... compared to the Huawei Watch 4 Pro Space Edition...
    As soon as I saw it on Skroutz at a price cheaper than the China price... I couldn't resist....

    Translated from Greek ·
    Did you find this review helpful?
  • 1
    3 out of 3 members found this review helpful
    kalergism

    Verified purchase

    It broke in the third week, what a shame! Stay away

    Translated from Greek ·
    Did you find this review helpful?
  • 5
    starserif

    Verified purchase

  • 5
    george6497

    Verified purchase

  • miltosx
    5
    miltosx

    Its quality is very good, except for the strap, which seems to be of lower quality. With normal use, the battery lasts close to a week. You need to keep the app open so it doesn’t disconnect from the phone! Nice, with lots of watch faces! Lots of workout programs; the biometrics work very well and are fairly accurate in their measurements.

    Translated from Greek ·
    0
  • Chi3ftain
    5
    Chi3ftain

    Perhaps the best-value smartwatch on the market. An incredible device. Strong support, continuous updates to skins and interface. Easy to use. The reasons I chose it were: 1. blood oxygen measurement 2. barometer with GPS 3. heart rate. Impressive watch—fantastic price (€120). Extremely durable. Long-lasting battery.

    Translated from Greek ·
    0
  • Petros_Zis
    5
    Petros_Zis

    The best thing out there!! You can’t find this kind of quality for 120 euros.. battery lasts 10 days easily, it’s excellent in the water, and best of all, you can knock it around left and right and nothing shows on the watch.. And as for the size, don’t let anything put you off—it’s just right and lightweight on the wrist.

    Translated from Greek ·
    1
  • Eldir13
    5
    Eldir13

    Overall, I was pleasantly surprised.... because I have other Kospet watches, I knew their quality... but now the new T4 and T4C have stepped up a level...
    The app is very good and has quite a few watchfaces.... The measurements are excellent... compared to the Huawei Watch 4 Pro Space Edition...
    As soon as I saw it on Skroutz at a price cheaper than the China price... I couldn't resist....

    Translated from Greek ·
    3
  • 1
    kalergism

    It broke in the third week, what a shame! Stay away

    Translated from Greek ·
    3
  • See all
112,51 €
14,00 €   shipping cost
Kospet