Features: New four-level push button 7.4v design Wind-Shark soft, breathable, and treated waterproof fabric shell construction Microfiber lined collar, arms, and body of jacket ESO locking front zipper, front hand pockets, inside storage pocket Shock cord waist adjustment Lycra cuffs for comfortable and secure fit Three 6.5" x 2.5" heating panels lined with steel alloy fiber elements Optimum placement of heating panels, with two on the chest and one on the back Battery life ranges from 2.5 hours on high to 10 hours on low temperature setting Surface temperature ranges of 135°/100%, 120°/75%, 105°/50%, 90°/25% Includes one 7.4v 2.0Ah rechargeable lithium-ion battery and charger (packaged separately)