It mainly measures the reverse maximum withstand voltage of power modules such as diodes, triodes, MOS tubes, thyristors, IGBT, etc; Test the voltage value of protective devices such as varistors and transient diodes; Test whether the leakage current of the capacitor exceeds the standard; Test the insulation performance of electrical products. This product has built-in lithium battery and USB charging port, which is convenient to use. In addition to 4mm banana socket output, it also adds a test locking , which makes it more convenient to test smaller devices. For high-voltage products, be to pay attention to the safety of use. When testing, do not touch the test clips and banana sockets and plugs. Remember to keep it properly and do not let children play to avoid danger. Basic Parameters: 1. Standby current of the whole machine: 0.1ma 2. Maximum working current: 1.05ma 3. Power supply mode: 3000ma battery 4. Display mode: digital tube 5. Adjustable test time: 10 seconds, 20 seconds, , 40 seconds, 50 seconds, 1 minute, 2 minutes, 3 minutes, 4 minutes 6. Adjustable test voltage: 500V, 800V, 1000V, 1200V, 1500V, 1800V, 2000V, 2200V, 2500V 7. Resolution: 0.1V 8. Protection circuit: battery protection circuit, output short circuit protection 9. Net weight of the whole machine (including battery): about 230g 10. Charging mode: USB charging 11. When the test voltage is above 0-2500v, press and hold for 3 seconds to display four 1s for continuous output Material: plastic colour: silver Package Contents: 1 x Withstand 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.