The Battery operated Air Pump gives you flexibility when powering your aquarium, meaning you’re not restricted by plugs! This powers 150 lph of air as a max flow rate, and includes 1 outlets for standard airline (airline sold separately). This offers you a high performance pump that will help you to improve the dissolved oxygen levels within your aquarium, and can also be used to add extra oxygen for temporary tanks or in bags when travelling. Ideal for transport, or great to have as a back up in case of power failures! This unit requires 2x D batteries (Not Inlcuded)