Feature: 1. Widely used in a variety of ornamental fish, aquariums, fish farmers, company fish tanks, etc. 2. Can be also used for emergency aeration during power outages, as well as aeration functions for wild fishing and a small amount of aquatic transportation. 3. The internal circuit adopts imported single-chip intelligent control, which has the characteristics of constant voltage and constant current charging, overcharge and overdischarge protection, and high safety coefficient. 4. AC / DC dual-purpose aeration pump, using pure copper movement, high-quality lithium battery, cycle life up to 500 times, full charge can be used continuously for 24 hours. 5. Features small size, low noise, large air volume, and long life. Specification: Item Type: Solar Powered Air Pump Product Model: AP003 Solar Panel: 6V 0.3W Charging Input: DC 5V / 1A Power: 0.5W Battery Capacity: 3.7V / 4400mA / h Air Pressure: 0.15mpa Air Volume: 2L / min USB Charging Time: 3-5 hours Working Time: About 24 hours Hose Length: Approx. 1 m / 3.3 ft Instructions: 1. Press and hold the power switch (press for 3 seconds), the blue light is on, and then start oxygen, at this time it is long-term oxygen mode. 2. Press the power switch again (press 1 time) to switch to the intermittent mode of oxygen mode (cycle mode of 2 seconds of stop and 8 seconds of oxygen). 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 red light display and enter into the blinking state, which means that the voltage is insufficient. Please charge in time. You can also give oxygen while charging Get oxygen while charging.. Package List: 1 x Solar Panel 1 x Rechargeable Battery 1 x Hose 1 x Charging Cable 1 Pack x Accessories 1 x User Manual