Just slide them inside of your gloves and the Gobi Heat Stealth Heated Glove Liners for Ladies will keep your fingers toasty warm with heating elements up and around each fingertip. Get back to doing the things you love with up to 6 hours of heat and 3 different heat settings: low, medium, and high. Mobile touch finger pads allow you to interact with your electronic device's screen without taking your winter gloves off. The included 7.4V lithium-polymer rechargeable batteries are built to last while still retaining their compact/lightweight form factor. Gobi Heat Stealth electric glove liners are made of a soft and warm polyester/spandex blend. Manufacturer 1-year limited warranty. Imported.Manufacturer style #: ST-ON. Made of a polyester/spandex blend Heating elements around each fingertip Up to 6 hours of heat 3 different heat settings Mobile touch finger pads Lithium-polymer batteries