This is a great pump for people with no power source to add a waterfall or filter system to an existing pond. It requires sunshine to run and comes with no battery. The two solar panels can be placed up to 16 feet from the pump. (can be extended a further 16 or 32 feet with the PE10 Solar Pump Extender available here on Amazon) Has dry cut out feature. Two sensors on the pump have to be submerged for it to work. Has locked rotor protection that prevents the pump from failure due to debris blocking the pump. Comes with full instructions and is easy to install and maintain. Warranty is a full one year from date you receive this item. Specifications: Description Solar brush-less water pump kit Product Summary Peak power 50Wx2 Max-power voltage 17.28V Max-power current 2.894A x 2 Includes method plastic ground spikes and 16 feet of hose. Max. head 3m(9.86ft) Max. flow rate 1,268 GPH Cable length 5m (16.4ft) Dry run protection Yes We pride ourselves on our before and after sale service.