The Hygger high efficiency AC/DC rechargeable aquarium air pump is designed to provide reliable aeration for your fish tanks and can also serve as an emergency backup during power outages. This versatile pump features a built-in lithium battery that offers up to 23 hours of continuous operation or 24 hours in intermittent mode, making it perfect for use outdoors, when traveling with aquarium pets, or in situations where AC power is unavailable. The air pump includes four LED lights indicating the charging status and simple controls for switching between continuous and intermittent modes, as well as adjusting airflow rate to meet the specific needs of your aquarium.