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 Voltage solar panel: 5V Solar panel charging time: 25H USB charging time: 5H Maximum airflow: 0.9 L/ 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 power for the battery. You just need to place the solar panel in a well-lit area to ensure sun exposure and connect to the host before the air stone falls into the pond. 3 modes Operation: Our aerator has 3 operation modes (high speed, low speed, low speed 10 seconds on and 10 seconds off). You can choose the suitable working mode according to different needs. High airflow of up to 0.9L/min helps restore oxygen levels in any garden pond. Design a 90 degree bendable solar panel, easily adjust the best angle to absorb solar energy. Easy to carry: Our Oxygen Mercury does not need wires to connect and is easy to install . It's designed to be small and light, like a Coke can. There is a metal loop on the back of the pump that you can attach to the belt or the side of the aquarium. Very easy to carry, ideal for sea fishing and transporting pet fish. The pump can be placed outdoors, but do not immerse it in water. High Battery Life: Built-in 2 high capacity 3600mAh 18650 rechargeable lithium batteries. It will operate in direct sunlight with or without batteries installed inside. The built-in battery keeps the pump running rain or shine or dark. Even if the battery runs out, you can charge it with USB without the need of sunlight. A multi-purpose machine: This eco-friendly, energy-saving and low-cost aerator is widely used in various aquariums, aquariums and ponds, especially for emergency oxygenation in the event of a power failure, oxygenation of wild fish and oxygenation of transportation. Helps keep ponds clean and provide a healthy living environment for pond organisms. It is also the best gift for fishing enthusiasts, friends and family.