100% brand new and high quality Specifacation: Solar panel: 5V 290MA Battery: 18650 lithium battery 3.7V 2200mAH Aeration pump: DC miniature air pump 1.8V 150MA Noise: 50dB Minimum airflow: 0.3L/min Air nozzle specification: 4.4MM (the external air nozzle of the product is 5.1MM) Product working power range: 3.2V4.2V 90MA Low battery indicator voltage (flashing green): 3.3V Full power indication voltage (red light on): 4.0V Charging protection voltage: 4.2V Working time: about 20 hours Charging method: solar; 5V 1A power adapter Size: 13x8x5cm/5.12x3.15x1.97in Features: 2 CHARGING METHODS: Not only can be powered by Solar but can be charged by DC power with its built-in input port. Rechargeable Battery inside to store power and support the night working. SOLAR POWERED OXYGENATOR: Up to 0.9L/min high airflow, Designed 100 degrees foldable solar panel, easy to adjust the best angle to absorb solar energy. Widely used for adding oxygen into various aquariums, fish tanks, pools, ponds, especially suitable for the power failure emergency oxygen increasing, the wild fish oxygen increasing and small amounts of aquatic transportation oxygen increasing. LONG WORKING TIME: Built-in 2200mAh large capacity battery, up to 20 hours working time once fully charged. Note: When the battery goes dead or is changed, you must restart the pump after changing the battery by 1) inserting a USB charge for 5 seconds or 2) let set in direct sunlight for few seconds. SAFE TO USE: Imported single-chip microcomputer intelligent control, support constant pressure and constant current charging, overcharge discharge protection, and low electric alarm. Solar Rechargeable Air Pump: Work not only during day time under the sun but also can work at night No operating costs Easy to install, no tools required Can be left outdoors all year round Keeps fish and pond-life healthy Help keep your pond clean and algae free Oxygenate your garden pond during the warm summer months when the water oxygen levels are low Oxygenate your garden pond with the power of the sun Suitable for small to medium-sized ponds, Sea fishing, fishing enthusiast Ideal for remote locations that do not have access to the standard electrical outlet Note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. IP64 waterproof rated air pump, DO NOT immerse it into water. Be careful to protect the solar panel to avoid any damage. Please turn off the oxygen pump when charging. Package Contents: 1 set Oxygen Pump