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 know-how is really easy to use. As lengthy because the indicator smooth flashes, it needs to be good. Since there are many sorts of peripheral circuits of optocouplers, if it is continually on or off, get rid of the light If you check the coupling again, you must 100 percent decide whether or not it's nice or bad. Before testing, the motherboard needs to be powered off and then discharged. Testing can't 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 height to bottom. If the optocoupler pins are rusty or have glue, you possibly can clear them somewhat in advance. Different batches could have various appearance, which doesn't impression use. Colour:Green Material:PCB+electronic features Package Contents: 1 x Optocoupler Tester Only the above package content, different merchandise should not included. Note: Light mirrored image and diversified exhibits could cause the colour of the object within the picture slightly varied from the genuine thing. The measurement allowed error is +/- 1-3cm.