1、Electrical Measurement: Insulation resistance measurement, alternating current (AC) electrical measurement, direct current (DC) electrical measurement. 2、Good Functions: Small resistance measurement, measurement data lock, low battery indication, large LCD digital display, backlight display function. 3、Reliable Performance: External direct current (DC) power supply DC9V 1.5A, overrun prompt, red alarm light, buzzer alarm, high voltage prompt. 4、Scope of Application: Suitable for insulation resistance detection of motors, cables, electromechanical equipment, telecommunication equipment, power facilities, etc. 5、Product Parameter: To ensure accuracy ambient temperature is 23±5℃. Relative humidity is <75%. Frequency response of AC voltage is 50～200Hz. Voltage input impedance is 1MΩ.