THAW 2 Rechargeable Hand Warmers & Knit Beanie. Two rechargeable hand warmers give your fingers much needed relief and easily fit in your pocket, so they're always with you. Double-sided heating and simple one-button controls. Heats up to 113 degrees fahrenheit and lasts up to 4 hours. Each hand warmer also features an integrated LED light so you can illuminate your task without freezing your fingers. The soft beanie is knit with acrylic fibers to give you a lightweight, warm and stretchable beanie to cover your head and ears.