XUEMEI [Solar Power]Solar energy powered, no electricity needed, just the sunshine, energy-saving, and environmentally friendly product. [Working Mode]The oxygen pump works for 10s and stops for 10s. It is recommended to install in a small family pond, and a small area of the pond to increase oxygen. [Easy to Use]Connect the tube and the air stone put it in the water, the aerator pump will float in the water and work. [Low Noise]Stable and silent oxygen pump, the volume is less than 60 decibels, and the air output is 0.8 liters/minute. [With Battery]Built-in 3.7V 2200mAh lithium battery to store power, so the oxygen pump can also work at night. Color: black blue Size: about 19*19*6CM Delivery Quantity: 1 Piece