The Battery Harness connects directly to the battery of your vehicle's battery, enabling your vehicle to also power your heated gear. It also enables your vehicle to supply power to 12V heated garments via ring terminals. Includes the following fuses: 3, 5, 7.5, 10, 15, and 20 Amp.All Gerbing installations require a Battery Harness to be connected to a Controller for operation (sold separately). Material: PVC Max Capacity: 20 Amps Power: 12V DC to 16V DC Length: 48" Includes fuse kit with 3, 5, 7.5, 10, 15, and 20 Amp fuses