_x000D_ _x000D_ _x000D_ It uses a type-c interface, which is rechargeable and the pins can be replaced._x000D_ After many hardware updates and parameter modifications, the current generation is very easy to use. As long as the indicator light flashes, it must be good. Since there are many kinds of peripheral circuits of optocouplers, if it is always on or off, remove the light If you test the coupling again, you can 100% judge whether it is good or bad._x000D_ Before testing, the motherboard must be powered off and then discharged. Testing cannot be carried out while the power is on. The pin marked on the device corresponds to pin 1 of the optocoupler, and press it from top to bottom._x000D_ If the optocoupler pins are rusty or have glue, you can clean them a little in advance._x000D_ _x000D_ Different batches may have different appearance, which does not affect use._x000D_ Colour:Green_x000D_ Material:PCB+electronic components_x000D_ _x000D_ Package Contents:_x000D_ 1 x Optocoupler Tester_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ 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._x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_