Description: Solar oxygen pump with built in a 2400mAh lithium battery for storing energy, thus the oxygen pump working in the night as well. Just put the solar panel in a sunny spot and it starts automatically. Suitable for a small to medium sized pond, outdoor fish tank or water reservoir, etc. Features: [Environment-friendly Solar Energy]The use of solar energy makes it environment-friendly, portable and easy to install with no need for wiring, no operating cost and maintenance free, and solar power is much safer for your kid. [Large Air Volume]Stable silent oxygen pump with less than 60 dB low noise and 1.4L/min air volume, suitable for 40-250L container. [Battery Backup]Built in a 7.4V 2400mAh 18650 lithium battery pack for storing energy, thus the oxygen pump working in the night as well. [Evenly Air Distribution]There are 3 working modes can meet your different demands, and two air flow outlets make the air distribution more even and pervasive. [Adjustable Angle]The solar panel angle can be adjusted to receive the sunlight most sufficiently. Perfect for bird bath, small pond, garden decoration, water circulation for oxygen, etc. Product Working mode: Pattern 1: high speed (green light normally on) working hours: 24 hours,flow: 1.3 L/min Pattern 2: low (blue light normally on) working hours: 48 hours,flow: 0.7 L/min Pattern 3: Low gear Open 10 seconds stop for 10 seconds (green and blue double color light normally on) working hours: 72 hours Specifications: Material: ABS Solar panel5W Polycrystalline solar panel included Battery7.4V 2400mAH Product working voltage range5.5V8.4V Discharge protection voltage5.5V Over charge protection voltage8.4V Solar charge time: 8 hours Max. working current: 150MA (high grade); 100MA (low gear) Quiescent current: less than 10UA Noise: 60dB Min. Air Flow: 1.4L/min Working Time: Approx. 24 hours Oxygen Hose Length: 250cm / 100in Air stone deepth: 100cm/39.37in Wire length: 3M / 118in Solar panel size: 27*18*2cm/10.62*7.08*0.78inch Pump Size: Approx. 9.5*5.5*5cm/3.74*2.16*1.96inch Package Size: Approx. 30.2*18.5*7.2cm / 11.88*7.28*2.83inch Package Weight: Approx. 1.33KG / 2.93lb Package List: 1 * Solar Oxygen Pump 1 * Package of Accessory 2 * Air Stone 1 * 2.5M Aquarium Oxygen Pipe 1 * Manual (English) Note: This product is an electronic product. The oxygen-increasing device cannot be placed in water, and the diversion hole cannot be blocked.