The slim and lightweight USB Hand Warmer provides soothing warmth for hours. Use it for outdoor activities such as camping, hiking, skiing and so much more. Features a built-in, rechargeable battery—recharges with the included USB cord. Features two temperature modes for adjustable, comfortable warmth with orange and blue LED indicator lights. When fully charged, the USB Hand Warmer can be used to charge a cell phone in an emergency situation. Indicator light will turn off when charging.