Feature: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. You can sleep close to it.2. [Pure Copper Motor] Fish tank air pump, all copper high frequency voltage stabilizer transformer, low resistance, reduced consumption, stable oxygen supply.3. [USB DC Powered] Plug in aquarium air pump, which can be plugged into a power bank for outdoor use. When the current is interrupted, it will no longer work.4. [Small And Portable] Mini fish tank oxygen pump, palm size, easy to carry, can be used indoors or outdoors, also can be used as a fishing oxygen pump.5. [Energy Saving] Aquarium oxygen pump is rated at 1.5W, which is energy saving and will not overheat when running. Provide a healthy environment for your fish.Specification:Item Type: Aquarium Oxygen PumpMaterial: ABSColor: WhiteModel Number: AC S2Power: 1.5W Air Volume: 1.5L Per MinutePressure: 15KpaHow to Use:1. This product should not be exposed to rain, placed in water or used in humid environments. The position of the air pump must be higher than the water level line. If it is lower than the water level line, please install a check valve to prevent the air pump from entering water.2. Please place it in a place that is not easy for children to access. Please use it under the guidance of an adult. The power supply voltage and frequency of the air pump must meet the requirements.Package List:1 x Aquarium Oxygen Pump1 x Charging Cable1 x Air Tube1 x Air Stone