Feature:1. This product is an AC/DC dual-purpose oxygen pump. It adopts pure copper movement and high-quality lithium battery. The cycle life is up to 500 times. It has the characteristics of small size, low noise, large air volume and long life. It can be continuously charged when fully charged Use 24 hours.2. The internal circuit is intelligently controlled by imported single-chip microcomputer, which has the characteristics of constant voltage and constant current charging, overcharge and overdischarge protection, low power alarm, and high safety factor.3. Widely used in a variety of ornamental fish, aquariums, fish lovers, company fish tanks, and family fish for aeration, especially suitable for emergency oxygenation during power outages, as well as for field fishing and a small amount of aquatic product transportation.Instruction:1. Press and hold the power switch (press for 3 seconds), the blue light will be on, and the oxygen will start. At this time, it is the long-term oxygen mode.2. Press the power switch again (press 1 time) to switch the oxygen mode to the intermittent mode, (stop for 2 seconds, and give oxygen for 8 seconds in the cycle mode),3. Charging: Please use the USB2.0 adapter charging head to charge this product. When the voltage is insufficient, the blue light will turn into a red light and enter the flashing state, which means the voltage is insufficient. Please charge it in time. You can also give oxygen while charging. That is, oxygen while charging.Specification:Charging input: DC 5V / 1ABattery capacity: 3.7V/3600mA/hAir pressure: 0.15mpaAir volume: 2L/minTube length: 132mm/52inPackage Includes:1 * Oxygen Pump1 * Solar Panel1 * Check valve1 * Air Stone1 * Hose1 * Charging Cable1 * Screw4 * Footpads1 * Hanging buckle