It is completely controlled with solar energy, requires neither electricity nor batteries. No battery in it, a really environmentally friendly solar pump (100% environmental protection). 1.4W solar fountain, maximum 70cm height Solar water pump with 4 different nozzles. The solar water pump can work normally even if some solar panels are blocked by the leaves. You can adjust the nozzles at any time according to your personal preferences and different scenes Easy to install and use, just put the pump in the water (there is a foam board), the sun does the rest. The brighter the sun, the higher the water can be pumped. Multiple uses. This eco-friendly fountain is great for bird bath, small pond, fish tank, pool, garden, water circulation for oxygen! Suggestion. Make sure you have put enough water in the bird bath for the pump to stay completely submerged. You should clean the pump regularly to avoid clogging the pump with dirt.