Product description.This product is a solar-powered oxygen pump that floats in water and is suitable for small fish tanks, ponds, and outdoor fishing to increase oxygen levels for fish and seafood. The product has a built-in 2200mAh lithium battery, which stores excess energy so it can continue to operate overnight. Simply place the solar panel in a sunny location and submerge it in water, and the pump will automatically start.Product features.[SOLAR POWER] Eco-friendly, portable, easy to install, no wiring, no operating costs, no maintenance. Solar power is also safer for your children. [INTEGRATED STORAGE BATTERY] Built-in 3.7V 2200mAh lithium battery to store energy, so the oxygen pump can also operate at night.[Silent] Stable and silent oxygen pump with a volume of less than 60dB and an air flow of 0.8 liters/minute, suitable for many types of small containers to increase the amount of oxygen. [Operating Mode] The product operates intermittently, 10 seconds of operation and 10 seconds of stop.Product parameters: Solar panel: 6V/2.5W, 180mm diameter / Battery: 18650 3.7V 2200mAh lithium battery / Noise level: less than 60dB / Airflow: 0.8L/min / Charging time: approximately 5-6 hours (solar charging)Air tube length: 1.5 meters Packing list: Oxygen pump X1, 1.5m air tube X1, bubble stone X1, English manual X1 (other products are not included).Please note that1) The operating power of the solar panel will be affected by weather conditions, location and other factors. 2) Do not operate the pump without water, as this will reduce its lifespan.3) Pump water regularly. If the pump is in operation, it will stop working.4. The packaging contains small parts, keep it out of reach of children and pets (choking hazard).