Handy Heater Rechargeable Hand Warmer, Portable Electric Pocket Warmers Winter Essentials Handy Heater Hand Warmers are cordless and rechargeable hand warmers, the pocket-sized devices that is designed to help keep your hands warm and toasty. Just turn Handy Heater Hand Warmers on and slip into your gloves or pockets for that warm and toasty feeling! Handy Heater Hand Warmers heat up to 131 °F in seconds. The sleek pebble shaped design is ultra-light and ultra-thin, with three heat settings for customized comfort. USB rechargeable so they can be used over and over, and when fully charged and used one at a time, back to back, can help keep you warm for up to 14 hours!* They have a magnetic backing so 2 units can become one larger warmer. Great for outdoors, sporting events, walking the dog, camping, hunting, tailgating, skiing, at the office, commuting and more! Take Handy Heater Hand Warmers anywhere you want warmer hands! *Each hand warmer, when fully charged, can run up to 7 hours. Run time will vary depending on speed setting and charge.