At the same time can test the insulation voltage of the object. Such as switches, buttons, connectors between the two legs of the insulation voltage test. It is also very convenient to test the insulation between windings, such as motor, industrial frequency transformer, high frequency transformer, phase-to-phase insulation, insulation measurement of the shell core. Wide range of applications can be measured: for NIMOS / for PMOS / for IGBT / transistor / unidirectional SCR / voltage regulator diode / light-emitting diode / rectifier bridge / varistor / ceramic gas discharge tubes / electrolytic capacitors / the withstand voltage value. Adjustable output voltage: DC 50V-3700V Voltage display accuracy: 0.3% Output voltage error: 50V, resistance has error actual output 3650-3750V Adjustable output current: 50uA-5mA Output mode: constant voltage, constant current output Maximum power of the whole machine: 5 Voltmeter resolution: 0.1V below 100V, 1V above 100V Battery capacity: 700mA lithium battery Charging current: 550mA Charging interface: TYPE-C (charging red light, full green light) Charging adapter: 5V1A cell phone charger can be Protection function: 80 over temperature protection (high temperature light blue) Lithium battery undervoltage: battery below 3.3V amount of blue light Colour:White&Black Material:ABS Package Contents: 1 x Semiconductor Voltage Tester 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.