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It makes use of a type-c interface, which is rechargeable and the pins would be replaced. After many hardware updates and parameter modifications, the present era is so easy to use. As lengthy as the indicator mild flashes, it ought to be good. Since there are many forms of peripheral circuits of optocouplers, if it is constantly on or off, eliminate the light If you test the coupling again, you possibly can 100% prefer whether or not it is good or bad. Before testing, the motherboard must be powered off after which discharged. Testing cannot be implemented while the power is on. The pin marked on the components corresponds to pin 1 of the optocoupler, and press it from peak to bottom. If the optocoupler pins are rusty or have glue, you'd clear them a bit of in advance. Different batches can have assorted appearance, which would no longer impact use. Colour:Green Material:PCB+electronic components Package Contents: 1 x Optocoupler Tester Only the above kit content, other products aren't included. Note: Light mirrored image and various exhibits could cause the color of the thing in the photo a little bit various from the genuine thing. The size allowed error is +/- 1-3cm.