Tour Master Synergy BT Pro-Plus 12V Heated Vest Maintain a comfortable core with Tour Master Synergy BT Pro-Plus 12V Heated Vest. 4-heating elements with 3 levels of heat give you control over the cold. Designed to work with the 12V power system on your ride or the optional battery pack and charger can expand the use of the vest to any outdoor sporting event. Features 100 Polyester wind and water-resistant soft-shell fabric 100 Nylon fixed liner Lycra side stretch panels 4 flexible carbon fiber heating elements (chest, back, and collar) Dual control option: Built-in 3-setting LED smart soft touch controller or Bluetooth controlled app Integrated microprocessor and thermal cut-off 12v DC / 37.2w draw / 3.1a current Heat settings: high (126f/52c), medium (113f/45c), low (100f/38c) Dual-power option: 12v direct-to-bike or available 12v Lithium battery (sold separately) Integrated and concealed battery harness Includes battery harness and safety fuse Machine washable & dryer safe