Type: Solar Air Pump Material: ABS Color: As shown Air Pump Type: DC Micro Air Pump Rated Voltage: 3.0V Swimming Noise: Less than 60dB Solar Panel Power: 0.9W Solar Panel Voltage: 5V Solar Panel Charging Time: 25H USB Charging Time: 5H Maximum Airflow: 0.9L/min Minimum Airflow: 0.5L/min Battery Type: 18650 Lithium Battery Battery Voltage/Capacity: 3.7V 3600mAH Light Control: Not supported. Solar Powered: Oxygen Mercury is a revolutionary upgrade from ordinary charging to solar charging, no electricity, just sunlight, the solar panel absorbs solar energy to run the pump and store extra energy for the battery. You only need to place the solar panel in a well-lit area to ensure sunlight exposure and connect to the host before the air stone falls into the pond. 3 Working Modes: Our aerator has 3 working modes (high speed, low speed, low speed 10 seconds on and 10 seconds off). You can choose the appropriate working mode according to different needs. High airflow of up to 0.9 L/min helps