Description: Solar oxygen pump with built-in a 3600mAH 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. [Low Noise]Stable silent oxygen pump with less than 60 dB low noise and 0.5L/min0.9L/min air volume, suitable for many kinds of containers. [Battery Backup]Built in a 3.7V 3600mAh 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 that can meet your different demands, and two airflow outlets make the air distribution more even and pervasive. [Widely Applicable]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 and working time on fully charged battery : Position 1: high speed (24H) Position 2: low speed (48H) Position 3: air pump 10 seconds and off 10 seconds circularly (96H)OFF Specifications: Material: ABS Solar panel1.5W, 6V polycrystalline silicon Battery2*3.7V 1800mAH 18650 lithium battery Pump3V DC air pump Product working voltage range3.0V4.25V Charging time: by solar panel under sunlight-15H;by 5V 1A charger-5H Noise: less than 60dB Min Air Flow: 0.5L/min0.9L/min Oxygen Pipe Length: 200cm / 6.56ft Charging Cable Length: 95cm / 3.11ft Solar panel Wire length: 300cm / 9.84ft Air Stone Size: Approx. 4*1.4cm / 1.57*0.55inch Pump Size: Approx. 14*8.2*3.5cm / 5.51*3.22*1.37inch Solar panel Size: Approx. 13*14cm / 5.11*5.51inch Package Size: Approx. 15*14.5*8cm / 5.9*5.7*3.14inch Package Weight: Approx. 634g / 1.39lb Package List: 1 * Oxygen Pump 1 * Solar Panel 2 * Air Stone 1 * 6.56ft Aquarium Oxygen Pipe 1 * T-Adapter 1 * Charging Cable 1 * Manual (English) Note: 1. This product is an electronic product. The oxygen-increasing device cannot be placed in water, and the diversion hole cannot be blocked. 2. Charging indication: when charging the 5 indicators are lit one by one; If the battery is fully charged, the indicators are constant on. 3. Solar charging speed is dependent on sunlight intensity. Please clean the surface of the solar panel regularly to keep the charging efficiency.