The rechargeable hand warmer is a small device that you can charge via a usb cord that you can throw into your pocket or inside your gloves to keep your hands warm during the cold winter. We know how important it is for you to keep your hands warm, since once they get too cold you are unable to pick up your cheeseburgers and feed yourself. The rechargeable hand warmer should stay warm for around 2-3 hours, charges it's battery in 1.5 - 2.5 hours, and once fully charged has a surface temperature of around 106 degrees fahrenheit.