Battery Backup - Dual Voltage Air Pumps are a must-have for serious fish keepers! These air pumps are able to continuously to operate even when there is a power failure. If the power goes out, or someone accidentally unplugs the pump, the internal DC battery automatically takes over and provides up to 8 hours of non-stop aeration. When the power comes back on, the pump switches back to AC power and recharges the battery all while operating at full capacity.

All this happens automatically as the pump seamlessly switches between AC or DC mode depending on whether there is incoming power. These pumps are great for koi ponds, reef tanks, aquaponics, hydroponics, fish breeders and more.