It uses a type-c interface, which is rechargeable and the pins would be replaced. After many hardware updates and parameter modifications, the present expertise is so easy to use. As lengthy because the indicator gentle flashes, it ought to be good. Since there are many types of peripheral circuits of optocouplers, if it is consistently on or off, get rid of the sunshine If you check the coupling again, you have to 100% choose whether or not it is good or bad. Before testing, the motherboard should be powered off after which discharged. Testing can't be utilized whereas the flexibility is on. The pin marked at the formulation corresponds to pin 1 of the optocoupler, and press it from height to bottom. If the optocoupler pins are rusty or have glue, you would possibly clear them just a little in advance. Different batches could have various appearance, which might now not impact use. Colour:Green Material:PCB+electronic ingredients Package Contents: 1 x Optocoupler Tester Only the above kit content, other merchandise are not included. Note: Light reflection and various displays could cause the color of the thing within the photograph a bit various from the real thing. The measurement allowed error is +/- 1-3cm.