????[Convenient Re-charger&Automatic Switch] USB power supply is easy for notebook computer/power bank/vehicle USB rechargeable. Lithium batteries will switch from electric to battery-operated automatically when the current electrical is interrupted.
????[Two Working Modes & Energy-Saving] 1. Continuous mode: Press the button to start working all the time, and battery storage can work continuously. 2. Intermittent Model: Double-click to mode to Intermittent mode.
????[High Dissolved Oxygen]The 1.7W air pump comes with 1 air stones and 1 hose,2.5W&5W pump come with 2 Air stones and 2 hoses.Dual air outlets can run 2 air stones at the same time. Effectively increase the oxygen content in the water puts off a nice spread of bubbles at a pretty good pace.
????[Blue HD Battery Power Indicate] The Blue HD Battery Power Indicate to understand the power and mode of the air pump clearly.
????[?30dB Low Noise] Magnet driver design to generate airflow in the space room and the air pump has rubber pads to reduce the noise. perfect for both Freshwater and Marine Aquariums.