The Bosch 4 gal. Electric Water Heater has a 4 gal. mini-tank that fits under your sink to provide hot water right where you need it. The heater plugs right into a 120 volt outlet and has a lightweight, compact design that's easy to handle and install. A glass-lined tank offers great insulation, while the heater's fast recovery rate eliminates long waits for hot water. A temperature-and-pressure relief valve enhances your safety. 4 gal. mini-tank fits under your sink to provide hot water right where you need itElectric water heater is easy to maintainFast recovery rate eliminates long waits for hot water6 year limited warranty, 2 year parts warranty98 percent thermal efficiencyGlass-lined tank offers great insulationPlugs into a 120 volt outletInstalls independently or in-line with a large hot water sourceCan be mounted on a wall