Faster Sampling Speed: Compared to the previous 138pro mini oscilloscope, this upgraded 154pro mini oscilloscope has a real-time sampling rate of 40MSa/s, a bandwidth of 18MHz, 500Khz signal generator frequency. Improve your work efficiency. 2 Trigger Modes & One-key AUTO: The DIY oscilloscope kit configured 2 trigger modes, auto/normal. Support waveform parameter setting,such as time base, amplitude, etc. Support waveform one-key AUTO to automatically adapt to the screen, no need to adjust parameters,convenient and accurate measurement. There are 14 measurement options available: Frequency, P-eak to P-eak, Duty cycle, Amplitude, RMS, Average, Period, +Pulse width, -Pulse width, Max, Min,Top, Base. Built-in High Voltage Protection: The handheld oscilloscope built-in high voltage protection module can withstand up to 400V AC/DC voltage signal. And built-in 1000m-Ah high-quality battery, can be used continuously for about 6 hours after full charge. Wide Applications: Ideal for the maintenance industry and the R&D education industry. It's very valuable for find AC bleeds in signaling wires, examin clock signals, PWM, checked for noise, and used it to debug SPI. And for a hobbyist, learn-to-fix electronic stuffs like phones, laptops, switching PS and such, it is a good choice. What You Will Get: 1*Digital Oscilloscope 1*High Voltage Probe 1*Typc-C cable 1*alligator clips 1*Manual