The portable oscilloscope Fnirsi DSO153 is the upgraded version of the DSO152 oscilloscope, which also features a function generator. The oscilloscope has 1 channel, a bandwidth of 1MHz, and a sampling rate of 5MS/s. It can measure a voltage range of up to 800Vpp with the provided sensor. The function generator has a single channel, an adjustable frequency range of 0-10 kHz, and an adjustable amplitude between 0.1-3.3 V. The function generator can also output 14 different waveforms, including sine, square, and sawtooth waves. The oscilloscope can be connected via MCX for signal input or via BNC using the provided adapter. The DSO153 also features a 2.8" HD LCD display. Finally, the DSO153 has a 1000mAh battery, allowing up to 4 hours of use on a single charge.