1. This product is by solar energy, using pure copper movement, high-quality lithium battery, the life is up to 500 2. It has the characteristics of small size, low noise, air volume and . It can be used continuously for about 15-20 hours when fully . 3. The internal circuit is intelligently controlled by single-chip microcomputer, which has the characteristics of constant voltage and constant current charging, overcharge and overdischarge protection, and high safety factor. 4. Widely used in a of ornamental fish, aquariums, fish lovers, company fish tanks, fish aeration for family fish, 5. It is especially suitable for emergency oxygenation in case of power failure, as as the oxygenation function for field fishing and transportation of a small amount of aquatic products. Product parameters: AP005 Solar panel: 6V/2.5W Battery: 3.7V/1800mAh lithium battery. life 500 Air pump rated voltage: 3.5V Air pump maximum current: 450MA Air pump bath sound: 50dB Minimum : 1L/min Circuit parameters: Operating voltage range: 3.0V-4.25V Maximum operating current: 450MA Discharge protection voltage: 3.0V Charging protection voltage: 4.25V Working time: about 22 hours Whether with light control: without light control Product weight: 0.65Kg Product size: 21.5X17.5X7CM Operating mode: A file: continuous high-power oxygen mode (green indicator light is on) B gear: continuous low power oxygen mode (blue indicator light is on) C gear: Oxygen for 10 seconds and stop for 10 seconds. Repeat the ( indicator light is on) Feature 1:with Solar panel Feature 2:low noise color:Black Material:plastic Package Contents: 1 x solar oxygen pump set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.