I just installed it and it is working all right. The voltage reading is not so accurate. It displays 12,2V and the car battery is 12,6V measured with a professional tool. To get better accuracy you have to attach it closer or directly to the car battery. You even get a fuse installed in the red cable which is really professional, and should be a must for these kind of products.
This product has not yet reached me Please make sure
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