This solar-power fountain pump is environmental-friendly and power saving,? pumps water in a few seconds in the sun(enough sunshine), also with battery backup, provide energy automatically when sunlight is weak. Pump and Solar panel Separated design ensures that pump continuously gets power from sunlight, avoiding solar panel shaded by a tree. It can be widely used in gardens, birdbaths, small ponds, water circulation for oxygen, etc. Specifications: Solar panel: 5.5V 3.5W 195mm solar panel (7.7") Battery Capacity: 500MA Battery Charging Time: 2-3hours Battery Working Time: 3-4hours Solar Panle Rated Current: 636MA Pump Rated voltage: DC 5-12V Delivery water height: 30-60cm Diameter of outlet: 8mm Cable length: 3M Stake height: 30cm Material: ABS Product size: 195mm / 7.7inch Package size: 21 * 21 * 5.3cm / 8.3 * 8.3 * 2.1inch Package weight: 400g / 14.1oz Note: 1. Working power of the solar panel will be influenced by weather, location, etc. 2. Don’t make the pump work without water