Feature: 1. Equipped with 5.5V 1.5W solar panel, supports solar charging, with lithium battery, it can be used continuously for about 15‑20 hours when fully charged. 2. Internal circuit adopts intelligent control of single chip microcomputer, constant voltage and constant current charging, overcharge and overdischarge protection, high safety factor. 3. It is used for oxygenation of various ornamental fish, aquariums, fish lovers, company fish tanks, and home fish pool, especially suitable for emergency oxygenation during power failure. 4. Supports continuous oxygen production and intermittent oxygen production. The minimum air flow is 0.8L/min, which is suitable for fish tanks of 1.5 meters and below. 5. Solar oxygen pump kit, small size, low noise, large air volume, supports ground insert and wall mount installation, to meet the oxygenation demand. Specification: Item Type: Oxygen Pump Set Material: ABS+Rubber+Copper Weight: Approx. 454g / 16oz Solar Panel: 5.5V 1.5W Battery: 3.7V 18650 lithium battery 4000mAh (included), cycle life is more than 500 times Air Pump Rated Voltage: 3.5V The Highest Current of Air Pump: 450MA Air Pump Noise: 50dB Minimum Air Flow: 0.8L/Min Solar Panel Waterproof Rating: IP65 Applicable Fish Tank: 1.5m / 4.9ft and below size Oxygen Production Mode: Continuous oxygen production/intermittent oxygen production Endurance Time: Fully charged. Intermittent gear can be oxygenated for 24 hours Oxygen Tube Length: Approx. 1m / 3.3ft. Package List: 1 x Oxygen Generator1 x Oxygen Tube1 x Bubble Stone1 x Charging Cable1 x Back Buckle1 x Back Button Screw1 x Ground Insert Plug1 x Wall Plug3 x Screw3 x Expansion Tube Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. For solar water pumps, the aeration host part cannot be placed in the water, and the diversion hole cannot be blocked.4. The host is equipped with a solar panel. Please face the solar panel to the sun to ensure that there is no obstruction between the solar panel and the sun. The charging speed is related to the intensity of sunlight. Regular cleaning of the dirt on the solar cells can improve the charging efficiency.