Tourmaster Synergy 2.0 Heated Pant Liner Designed to operate in all weather conditions from a vehicles 12-volt electrical system Warmth without bulk or discomfort, making for a safer, more enjoyable ride Lightweight, flexible steel fiber heating elements provide safe, even warmth Expanding side panels help fine tune the fit and increase comfort Water-resistant, single or dual rheostat available Temp Setting Temp (F) Draw (W) Draw (A) Level 1 107.6 48 4 Level 2 123.8 48 4 Level 3 136.4 48 4 Level 4 150.8 48 4 Level 5 163.4 48 4 Note Pants come with a harness to hook up to battery, but a heat level controller sold separately.