GT5 Hybrid Gloves use Gerbing's Microwire heating technology which incorporates micro-sized heating fibers to surround your hands with warmth. GT5 hybrid system allows you the option of powering from your vehicle's 12 volt electrical system or from Gerbing's 12 volt Hybrid lithium-ion battery pack (sold separately) with its built-in microprocessor temp controller. Premium, supple, drum-dyed aniline cowhide leather on palm and Nylon back of hand. Aquatex™ waterproof and breathable internal membrane to keep hands drier. Soft tricot fleece lining. 150 g 3M Thinsulate™ insulation. Max heat 135°F. Power: 12 V DC 2.2 A. TPU knuckle protection. Heated on both front and back of hand plus along fingers and thumb. Elastic wrist with adjustable strap. Gauntlet cuff with drawstring. Lifetime Warranty on Microwire™ heating elements. Heating Time on 12 V 9,000 mAh Battery Power:. High: 1 Hour. Medium: 2.5 Hours. Low: 4 Hours. Connected to Vehicle Battery: Unlimited. Two 12 V batteries and wall charger are optional (sold separately).. Gerbing Temperature Controller highly recommended (sold separately)..