BestProtect Solar Panel Powered Brushless Water Fountain Pump Pool Garden Watering Kits,Suitable for Bird Bath, Fish Tank, Small Pond, Garden Decoration, Water Circulation for Oxygen Useful life period: 20000Hours Maximum delivery head: 85cm Maximum water height: 55cm Maximum quantity of flow: 175L/h The pump will start automatically in 3 seconds when bright sunlight shines on the solar panel directly without any shadow.