Features: *1. Environment-friendly Solar Energy: The use of solar energy makes the pump 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. *2. Low Noise: Stable silent pump with less than 60 dB low noise and 0.5L/min－0.9L/min air volume, suitable for many kinds of containers. *3. Battery Backup: Built in a 3.7V 3600mAh 18650 lithium battery pack for storing energy, thus the pump works in the night as well. *4. 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. *5. 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 : Mode 1: High speed (24H) Mode 2: Low speed (48H) Mode 3: Air pump works 10 seconds and off 10 seconds circularly (96H) Specifications: *1. Material: ABS *2. Solar panel: 1.5W, 6V polycrystalline silicon *3. Battery: 2*3.7V 1800mAH 18650 lithium battery *4. Pump: 3V DC air pump *5. Product working voltage range: 3.0V－4.25V *6. Charging time: By solar panel under sunlight-15H;by 5V 1A charger-5H *7. Noise: Less than 60dB *8. Min air flow: 0.5L/min－0.9L/min *9. Oxygen pipe length: 200cm / 6.56ft *10. Charging cable length: 95cm / 3.11ft *11. Solar panel wire length: 300cm / 9.84ft *12. Air stone size: Approx. 4*1.4cm / 1.57*0.55inch *13. Pump size: Approx. 14*8.2*3.5cm / 5.51*3.22*1.37inch *14. Solar panel size: Approx. 13*14cm / 5.11*5.51inch Package include: 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.