Aquarium Rechargeable Battery Multi-function Portable Energy-saving Power Silent Oxygen Pump Single Gas Stone Suitable For Indoor Power Outage Fishing Features: [The air pump has two working modes, plug and play] The multi-functional rechargeable air pump can be used when in. The stored power is automatically switched when the current power outage occurs. Convenient FeaturesRechargeable function, very useful for your fish tank when you are away from home or when the power goes out. Air Pump with 1 Air Stone and 1 Hose, High Dissolved OxygenThis set contains 1 Air Stone and 1 Hose, Air Pump with Dual Air Outlets, can run 1 Air Stone at the same time. Bubble stone can effectively increase the oxygen content in the water and help the fish healthily. Battery level display screenBlue power light on the surface of the air pump, you can clearly the battery level and the air pump mode. Noise30dB Energy SavingThe air pump has rubber pads to reduce noise, so the noise is low. Excellent emergency aquarium oxygen pump Great for and marine aquariums Product Description: Model: SB-168 Power: 1W Air volume: 3L/min Air outlet: single hole Suitable for fish tank: 30L Size (length, width and height): 11 *6.8*4.8cm USB cable length: 100cm Hook: yes