AKOMA Dog Products Hound Warmer Deluxe Blue 22" x 11" x 0.5" Comes with a conversion kit to easily adapt to any other cooler in minutes Powered by (4) "D" cell batteries 6-volt (not included) for 75+ hours Very comfortable 11" x 22" cushioned pad Chew proof tubing cover Insulation around internal tubing prevents condensation/"sweat"