Silent Air Battery Operated Air Pump by Penn Plax

If you worry about how your fish will survive in the event of a power outage, the Silent Air B-11 Air Pump will give you peace of mind. It runs on 2 "D" batteries (not included) and plugs into a standard AC outlet; it detects a power outage immediately and begins to provide lifesaving bubbles for as long as they're needed. When the power comes back on, it shuts off to preserve battery life. Built-in on-off switch. Can be unplugged from wall and used as a portable pump. Dimensions: 5½" x 3¼" x 1½" Details: Includes flexible silicon airline tubing (18" of tubing) and a small air stone. Power cord is approximately 3 feet long. Small clip mounted on back of unit to clip on the edge of bait buckets or your belt. 110V - 60 Hz operation only.