With three real shock modes, trainees feel actual electric shock, understand its danger, value safe electricity use, and learn correct escape methods and emergency rescue measures. Functions: AC and DC modes switchable on the main screen; pulse mode with 10 steps of 10-15V; humid/dry comparison via a humidifier; automatic voltage ramp (fast at low voltage, slow at high); current limiting to 12mA with 1mA adjustment; smart data latch of RMS and peak values; real-time current curve; sampling at 0.1s or faster.