Feature: 1. Use solar and AC charging, built in high quality lithium battery, cycle life up to 500 times. 2. Have the characteristics of small size, low noise, large air volume and long life, can be used continuously for about 15 hours when fully charged. 3. Intelligent control of imported single chip microcomputer, with features of constant voltage and constant current charging, overcharge and overdischarge protection, and high safety factor. 4. Widely used in various ornamental fish, aquariums, fish enthusiasts, company fish tanks, and family fish fish for oxygenation. 5. Especially suitable for emergency oxygen increase in power outage, as well as oxygen increase function for fishing in the wild and transportation of a small amount of aquatic products. Specification: Item Type: Solar Powered Oxygenator Material: Brass and plastic Model: AP008 Solar Panel: 6V 3.5W Battery: 3.7V 4000mAh lithium battery. Cycle life 500 times (shipped with built in battery) Charging Time: Solar charging about 10 hours. USB charging about 5 hours. Air Pump Rated Voltage: 3.5V The Highest Current Of The Air Pump: 150MA Air Pump Bath Sound: <60dB Maximum Air Flow: 1L/min Minimum Air Flow: 0.5/min Circuit Parameters: Working Voltage Range: 3.0V－4.25V Maximum Working Current: 150MA Discharge Protection Voltage: 3.0V Charging Protection Voltage: 4.25V Working Mode: 2 level (continuous oxygen increase. Intermittent oxygen increase for 4 seconds and stop for 4 seconds, repeat cycle) Whether with Light Control: Without light control. Package List: 1 x Solar Powered Oxygenator2 x Oxygen Head2 x Water Pipe1 x Black Fixing Frame1 x Black Insertion Rod2 x Gasket1 x Wrench3 x Screw2 x Screw Nut1 x Black Accessory2 x Transparent Accessory1 x USB Cable1 x Solar Panel1 x User Manual Note: 1. This product is an electronic product. The aerator part cannot be placed in water, and the diversion hole cannot be blocked.2. This product is a solar product. 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.