Automatic Rechargable AC/DC Air Pump. Features include: Automatically switches to battery backup in event of power failure & recharges when power is restored. Integrated D-cell battery slots for use when main battery pack is exhausted. Adjustable, electronic flow control with interval battery extension technology. Two output modes: Full mode: pumps continuously for 14 hours on full battery & Interval mode: runs one minute on, one minute off extending battery operation up to 28 hours (approx). Removeable, 6 volt Nickel Cadmium battery pack included. Designed with dual output ports & impact resistant housing. INPUT PWR: 110V/120V 60HZ. PWR USAGE: 12 watts. OUTPUT: 65 GPH. PORT SIZE: 2 - 3/16" BATTERY: 6V NI-CAD OR (4) D-CELL. PROTECTION: OVERLOAD & DEEP CYCLE DISCHARGING.