[Solar Powered] This energy-saving and environmentally friendly oxygen pump is powered by solar energy, requiring no electricityjust place it in direct sunlight to operate. [Working Mode] The pump operates in cycles: 10 seconds on and 10 seconds off. Ideal for small family ponds or localized areas needing supplemental aeration. [Easy to Use] Simply connect the air tube and air stone, submerge them in water, and the floating aerator will begin working automatically. [Low Noise Design] Features a stable and quiet operation with noise levels under 60 decibels and an air output of 0.8 liters per minute. [Built-in Battery] Equipped with a 3.7V 2200mAh rechargeable lithium battery, allowing the pump to continue functioning at night or during periods of low sunlight. Color: Black Blue Size: Approximately 19 x 19 x 6 cm Package Includes: 1 Unit