Features: 1.[Ultra Quiet] 40dB aquarium oxygen pump, very quiet. There are 4 non slip rubber feet on the bottom to prevent sliding and reduce noise. It will not affect the rest of you and the fish. 2.[Rechargeable] Aquarium air pump can be plugged in or recharged for direct use. When the current is interrupted, it will switch from electric to battery to meet the needs of different scenarios. 3.[Pure Copper Motor] Fish tank oxygen pump adopts an all copper high frequency voltage stabilizer transformer, which has low resistance, reduces consumption and stabilizes oxygen supply. 4.[Strong Power] Fish tank bubble pump has stable performance and powerful motor, which is easy to provide large capacity and stable bubbles. Can be used indoors and outdoors, as fishing oxygen pump. 5.[Double Outlet] The fish tank air pump is designed with 2 water outlets, which can be connected to 2 air stones in one water tank, and can also provide oxygen for two fish tanks. Specification: Item Type: Aquarium Oxygen Pump Material: ABS Battery Type: 1 x 18650 Lithium Ion Battery Capacity: 2000mAh (Shipped with Built in Battery) PackageList: 1 xAquarium Oxygen Pump 1 x Charging Cable 2 x Air Tube 2 x Air Stone