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. And 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: perfect for the maintenance industry and the 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 Get: 1 *Digital Oscilloscope , 1 * High Voltage Probe , 1 * Type-C cable , 1* alligator clips , 1*English manual Colour:black Material:Metal Package Contents: 1 set x oscilloscope Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.