With Automatic mode, conventional mode and single trigger mode. Included 10:1 BNC probe and 9V DC power charger included, Convenient to capture the instantaneous waveform. With secondary development on the basis, can be changed to voltmeter, data loggers. 2.4-inch color TFT display Waveform parameter digital display include: Frequency, period, pulse width, duty ratio, MAX./MIN./AVG./Peak-Peak/virtual values and effective value; Adopts ARM Cortex-M3 processor (STM32F103C8) Rising or falling edge trigger are available, also the trigger level position and vertical displacement are adjustable. Short-circuit and open-circuit detection to find out the soldering error Observable the previous waveform before trigger (negative delay). Freeze waveform display at any time (HOLD function). Come with instructions, easy to install and operate Waveform storage function: Waveform will not lose when save/tune out the waveform/shutdown waveform. Test signal source with 1KHz /3.3V square wave