Good site Used for over 2 years without BIG failures, even SnapOn Mac Matco and many other big tool vendors only recommend Schumacher but when they do they just change the sticker with their own brand. A lot of big retailers also use Schumacher (I've seen it at a lot of different retailers). , the brackets no longer close straight. The wires coming out of the main box are not fully seated and this worries me when getting in and out of the box where the hole is. from the values shown example 13.6v actually shows cars as 13.12v or 14v is shown as 13.78v so it always loses 0.2v 0.3v in between *** I'm not a professional influencer, therefore our miles may vary depending on circumstances***