1Built In 2200mAh Battery Backup: This solar powered oxygen pump has a built in 2200mAh battery backup, during the day, the solar panel powers the air pump and charges the battery, and at night the battery powers the air pump. 2Wide Application: This solar powered oxygen pump has a wide range of applications for fish ponds, aquariums, fish transportation, wild fishing, hydroponics, and other places where supplemental oxygen is needed. 3Solar Powered: This solar powered oxygen pump is solar powered, no wires to connect, and is safe for fish and hydroponics. 43 Modes: This solar powered oxygen pump has 3 modes, A speed is continuous high power oxygen pumping mode, B speed is continuous low power oxygen pumping mode, C speed is oxygen pumping for 10 seconds and stopping for 10 seconds to repeat the cycle. 5IP55 Waterproof: This solar powered oxygen pump is waterproof with IP55 rating, which can be used in any weather, very convenient to use. 1 x Solar Panel 1 x Pump 4 x Screw 4 x Expansion Screw 5 x Fixed Fittings 2 x Hose Connector 1 x Hose 1 x Hose Speed Control Fitting 2 x Bubble Stone