The Gerbing Heated Handwarmer Muff allows you to keep your hands warm without being restricted by gloves. Using our Microwire Heating Technology, the handwarmer reaches extremely warm temperatures giving your hands and fingers a safe haven from the bitter cold outside environment.Features:Adjustable buckle strapsJust plug into provided 7V 2.2Ah rechargeable lithium battery that hides away in a pocketConstructed with durable fleece fabricAvailable in BlackIncludes rechargeable battery & wall chargerSpecifications:Heating Technology: Core Heat Transfer SystemPower Source: 7V 2.2Ah lithium-ion batteryCurrent: 1.1AWatts7.7WSurface Temp: 135°FBattery Life:Approximate battery capacity per charge:100% 2 hours75% 3 hours50% 5 hours25% 10 hoursSizing:One Size Fits Most Gerbing 7V Battery Heated Handwarmer Muff