The 12V Duo Hybrid Heated Vest has versatile capabilities that is designed to work with small to medium size bikes, snowmobiles, ATVs, and older vehicles with limited available power. Although this heated vest draws less than 1.5 amps, it still powers the 4 heating panels located on the collar, chests, and back. The Duo Hybrid heated vest can be powered by your vehicle's battery via battery harness or by an optional 12V battery. Use the lightweight 12V battery and extend your warm after a long bike ride. The exterior shell is both water and wind resistant, which keeps you warm and dry on your adventures