Pumping up your air mattress is a quick and easy process with the help of the Coghlans 817 Battery Powered Air Pump. This pump comes with four different adapters to suit your every need. Dimensions: 5W x 5.5D x 4.3H in.. Plastic construction. Powered by 4 D batteries (not included). Compatible with most inflatables. Includes 4 adaptors to fit a variety of inflatables.