Quite good for the use I bought it for. I put it in the outdoor parking to maintain the motorcycle battery because during the winter, due to limited use, my battery constantly dies. It withstood yesterday's 12-hour rain without any problems. It's not meant to be submerged in water, just to get wet. It has 3 very convenient accessories (that's why I bought it, otherwise there are equally good ones for less money). It has a cable with two rings that screw securely onto the battery terminals and on the other end, a plug that I placed under the seat and which connects to the charger cable. With this, I don't have to do much when I leave with the bike or when I come back. The plug is permanently attached to it. It also has the classic crocodile clips and an adapter for the car cigarette lighter socket. Good purchase, it remains to be seen how it holds up over time