Equipped with a powerful 7800mAh rechargeable battery, our aquarium air pump can deliver up to 108 hours of continuous operation on a single charge, making it ideal for long fishing trips or during power outages. Easily recharge via USB with your laptop, wall charger, or power bank. This versatile air pump automatically switches between AC and DC power, ensuring uninterrupted operation. In case of a power failure, the built-in protection system activates the lithium battery, allowing you to maintain oxygen supply even in emergencies. Designed with precision components and noise reduction technology, this aquarium aerator can be used in both freshwater and marine tanks, as well as during outdoor fishing. The stepless air volume adjustment allows users to customize the airflow according to their specific needs. Stay informed with the large LCD screen that shows battery levels and operating modes. With 8-speed adjustable air volume settings, you can effortlessly choose the best airflow.