Features: 11. 2022 newly upgraded aquarium air pump: 3 different modes: continuous mode, energy-saving mode, intermittent mode. Two air outlets make the air distribution more even and universal. 22. 2 in 1 solar and rechargeable battery backup: Equipped with a very competent solar panel, making it an energy-saving and environmentally friendly product. A built-in 3600mAh battery pack is used to store energy, so the oxygen pump can also work at night. 33. Wide applications: It is suitable for oxygenation of various aquariums, fish tanks, pools, and small pools, especially suitable for emergency oxygenation of power failure, wild fish oxygenation, and a small amount of water transportation. 44. Compact and easy to install: Just put the air stone into the water, then install the solar panel, once exposed to enough sunlight, the pump will start working within seconds. Small size and lightweight, easy to move or carry, especially suitable for fishing. 55. Low noise and waterproof: stable and noiseless oxygen pump, less than 60dB low noise oxygen pump, equipped with 1 hose, 2 air stones, and reverse flow valve. Material: polysilicon ABS Color: as shown Nominal voltage/capacity: 3.7V 3600mAh (two 1800mAh cells in parallel) Solar panel parameters: Nominal voltage: 6V Power: 1.5W Process: Polycrystalline glass lamination Size: 130*140mm Oxygen pump parameters: Air pump type: DC micro air pump Rated voltage: 3.0V Bath sound: less than 60dB Maximum airflow: 0.9L/min Minimum airflow: 0.5L/min Circuit parameters: Operating voltage range: 3.0V-4.25V Maximum working current: 150 -10mA (high gear) 75 -10mA (low gear). Quiescent current: less than 500UA Discharge protection voltage: 3.0V Charging protection voltage: 4.25V Whether with light control: without light control Package Included: 1 * Host1 * Solar Panel2 * Air Stones1 * Tube1 * USB Cable