This is a portable shower that can be connected to a car's cigarette lighter socket. I've used it about once for camping. I think it's good for people who like a retro atmosphere and those who love the outdoors! Operation has been confirmed, but the silicone material of the power switch has become sticky due to aging. Please purchase only if you understand that this is an old item. Tank capacity: 20L Rated voltage: 12V Power consumption: 18W