Size: 36 in. Wide x 60 in. Long Heated Mattress Pads to fit boat beds! Runs on 12 Volt Power! Enjoy a great night's sleep anywhere. 12 volt bunk warming pad goes "on the mattress" under you (heat rises). Plugs into the lighter socket. Pre-warms bunk and gets rid of dampness. Heat soothes and relaxes tired back and legs. Helps lull you to sleep. Keeps you warm all night without idling the engine. No more engine noise or vibration. Automatic Comfort Control thermostat regulates heat based upon the setting you select (1 - 7). It adjusts the heat in the bunk for any change in cabin temperature. As the cabin cools, it supplies just the right amount of extra heat to keep you comfortable. Highly Efficient - the "on the mattress" system with automatic Comfort Control converts 98% of the battery power consumed to heat. Average current usage is about 3 amps... *Click Here For More Details*