Thermal and lightweight materials to fit under jacket or used by itself. Heated Jacket Liner is wired directly to your bike’s battery allowing for near endless warmth; if your bike can run, you can stay warm. Jacket Liner comes with necessary wire harness for wiring to your bike’s battery. When more than just core warmth is needed, connectors at the end of each arm allow for easy connection to FirstGear’s Heated Glove Liners. Connect to your vehicle’s 12V battery system. DC:12V, Draw: (75)W