It does not require power batteries, any additional investment or pollution. The important thing is that it will attract many birds to your garden. [Six nozzles and six modes:] The solar water source contains six different nozzles, which will produce different spray forms and spray modes. The height can be adjusted by changing the nozzle to prevent splashing out of the water tank. This environment-friendly solar fountain pump has a diameter of 6.3 ", which is very suitable for bird washing pool, fish tank, pond, swimming pool, garden, outdoor and oxygen circulating water. Just put the bird sun bath fountain under the sun in the water. The greater the sun, the better the effect. You must clean the pump regularly to prevent the pump from being blocked by dust. Welcome and I wish you a happy life, my friend., Manufacturer: JOLIANE