Aquatop's BREZA Battery Powered Air Pump is an essential piece of equipment for aquarists of all levels. Although similar to standard aquarium air pumps, the BREZA AC/DC-ONE offers an ingenious design which combines an AC power failure sensor with integral back-up battery power! In the unfortunate event of a power outage or when the standard electrical connection is lost, our battery powered air pump automatically switches over to back-up battery power when the AC power failure sensor in plugged in, providing a temporary lift support system for your aquatic creatures. The BREZA AC/DC-ONE's versatile design also makes it a portable air pump, perfect for fish bait buckets or for transporting aquatic creatures. The BREZA Battery Powered Air Pump will help keep your fish alive and healthy each day, and will protect your aquarium's inhabitants during a power outage, even if you're not around to turn it on.