Quantity: one set Solar panel: 5V/1.4W Battery: 3.7V/2200mAh Oxygen pump: Micro air pump DC 1.8V 150MA Working voltage: 3.2V-4.2V 90MA Working hours: about 20 hours or more Charging method: solar charging + 5V 1AUSB charging Inner box size: 14.2 x 10 x 8.2cm. Product gross weight: 0.453kg Packing quantity: 40 pieces. Outer box size: 50 * 29.5 * 34 cm Package weight: 14.6 kg Accessories: DC charging cable * 1 + straight head * 1 + T head * 1 + bubble stone * 2 + 30 cm hose * 1 + 1 m water pipe * 2 + instruction manual * 1 Powered by solar energy, no batteries or electricity needed, energy saving and environmental protection. Made of high quality durable ABS material. 100 degree foldable solar panel, easy to adjust a better angle to absorb solar energy. Built-in 2200 mAh large capacity battery can work for a long time up to 20 hours when fully charged, meanwhile this air pump can be charged by DC power via USB cable. The internal circuit adopts imported single-chip intelligent control, supports constant voltage and constant current charging, and has counter-protection. Good quality product