Introducing the AQQA Aquarium Air Pump, a portable and rechargeable oxygen pump designed to keep your fish and aquatic pets healthy and happy. 2 air ports electric and a size of 2.5W, this pump is suitable for aquariums ranging from 1-140 gallons. Can be used on its own battery power for when your homes power cuts off or during moving fish from place to place. It can also be plugged in for continuous use.