The ActionHeat 5V battery heated mittens are the perfect blend of quality, heating performance, and comfort. Using a lightweight textile, the ActionHeat mittens provides circulating warmth and comfort. The heating elements are perfectly positioned along your fingers and thumbs so the heat circulates throughout your entire hand for complete warmth. Slim batteries fit into a discreet pocket on the extended gauntlet for a comfortable fit. The ActionHeat 5V Mittens feature touch-button technology, with 3 easy to use heat settings. The mittens will reach a maximum temperature of 140F and can last up to 5+ hours.how To Use:1. Charge Up – Fully charge power banks with provided charger kit.2. Plug-In – Connect the power bank to Usb plug located in the pocket.3. Turn On – Press and hold touch-button control on the wrist for 3-5 seconds. Press touch-button to adjust the temperature.