Solar Powered: Our 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 just 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 restore oxygen levels in any garden pond. Design a 90-degree foldable solar panel, easily adjust the best angle to absorb solar energy. Easy to Carry: Our does not need wires to connect and is easy to install. It is designed to be small and light, like a can of Coke. There is a metal buckle on the back of the pump that you can attach to your belt or the side of your 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 work in direct sunlight with or without batteries installed inside. The built-in battery allows the pump to work whether it is raining or dark. Even if the battery runs out, you can charge it with USB without needing sunlight. One machine for multiple uses: This eco-friendly, energy-saving, and low-cost aerator is widely used in various aquariums, fish tanks, and ponds, especially for emergency oxygenation during power outages, wild fish oxygenation, and transportation oxygenation. 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. Solar panel: 5V Battery: 3.7V/3600mAh lithium battery. Life cycle 500 times Charging time: Solar charging about 20 hours. USB charging about 5 hours. Air pump bath sound: <60dB Maximum airflow: 0.9 L/min Minimum airflow: 0.5/min Circuit parameters: Operating voltage range: 3.0V-4.25V Maximum working current: 150MA Over-discharge protection voltage: 3.0V Charging protection voltage: 4.25V Working mode: three gears (continuous high-level oxygenation. Continuous low-level oxygenation. Intermittent oxygenation for 10 seconds and stop for 10 seconds. Repeated cycle) Whether with light control: without light control Number of pieces delivered: 1 piece