The Adafruit Feather 32u4 Radio (RFM69HCW) 433MHz is a microcontroller with wireless transmission capability. It features built-in USB and battery charging capabilities, making it ideal for creating wireless networks with a range greater than 2.4GHz 802.15.4. It is designed to be thin and lightweight, offering flexibility for portable applications.

At the heart of the Feather 32u4 is the ATmega32u4 with an 8MHz clock and a logic voltage of 3.3V. The microcontroller has 32K flash and 2K RAM and supports USB connectivity without the need for additional chips.

Additionally, it has a port for 3.7V lithium batteries and can operate via USB as well. If you have a battery, you can charge it via USB, while the Feather automatically switches to USB power when available. There is also the capability to monitor battery voltage via an analog port.

Features:

• Dimensions: 51mm x 23mm x 8mm
• Weight: 5.5g
• ATmega32u4 at 8MHz with a logic voltage of 3.3V
• USB support with bootloader and serial port debugging
• 20 GPIO ports
• Support for Hardware Serial, I2C, SPI
• 8 PWM ports and 10 analog inputs
• Built-in 100mA lithium charger
• LED charging status
• Resettable

This board also includes the RFM69HCW 433 MHz radio module, which supports the creation of multi-point networks with encrypted data transmission.