LBRNO&reg; 1.4W Solar Fountain Pump Pond Music Solar Fountain for Bird Bath 7V/1.4W Solar Battery; 6.3" Diameter of Solar Panel Maximum water height = 40" Minimum water depth in fountain should be 2" Lifespan 20,000 hours Floating design, put it in the pool without any attachment No battery or electricity needed, once the sun hits the solar panel, it will begin working immediately