Solar Energy Efficiency: This solar charging panel operates at an impressive module efficiency of 21.5%, making sure optimal energy conversion from sunlight to power your oxygen pump effectively. USB Output Convenience: The integrated USB output port allows for straightforward connectivity, making it compatible with a variety of devices and hassle-free charging of the oxygen pump. Low Power Consumption: With a power rating of just 2W for the oxygen machine, this system is designed to operate economically while delivering consistent performance, making it a sustainable choice for your aquatic needs. Working voltage: 5V Working current: 0-1000MA Power: 2W Colour:Black Material:Monocrystalline Silicon Package Contents: 1 x Solar Pond Aerator with Air Pump Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.