Back Seat Heat Plus 1100 BTU 12V Truck Heater 12 Volt, 25 Amp heater 300 Watts, 1100 BTU's heat output is battery safe Comes with a 20 ft. wiring harness with an in-line 30 amp fuse Easily installs with some tools required. Some hard wiring required as well Helps with circulating your vehicles existing heater, it is NOT a replacement to your vehicles heater