Features Dual Power Supply: Equipped with a 2200mAh rechargeable battery and a 6V 4W solar panel, this oxygen pump supports dual power supply for work. Wider Application: The cordless oxygen pump kit can be flexibly applied to fish tank, aquarium, hydroponic plants, field fishing and so on. Adjustable Levels: Designed to have high level, low level and intermittent level, the oxygen pump can work for 18 hours, 36 hours, 72 hours. Stable in Working: Having been through excellent workmanship, the solar oxygen pump is very sturdy with rain and sunshine, ideal for outdoor. Easy Installation: Light in weight and compact in size as well, the aquarium oxygen pump is very convenient to install in several minutes. Specification: Item Type: Solar Oxygen Pump Solar Panel: 6V 4W Battery: 1 x 3.7V rechargeable lithium battery 2200mAh, shipped with built in battery. Water Pump Power: 0.5W Maximum Bubbling Flowing Rate: 0.8L/min Level: 3 level of high, low and intermittent. Working Hours: 18H, 36H, 72H.  Package List:1 x Solar Panel1 x Pump4 x Screw4 x Wall Plug5 x Fixing Accessory2 x Hose Connector1 x Hose1 x Hose Speed Control Accessory2 x Bubbling Stone1 x User Manual Package List 1 x Solar Panel 1 x Pump 4 x Screw 4 x Wall Plug 5 x Fixing Accessory 2 x Hose Connector 1 x Hose 1 x Hose Speed Control Accessory 2 x Bubbling Stone 1 x User Manual