The ActionHeat 5V battery heated glove liners are perfect for all outdoor activities to keep the hands warm and toasty. With the thin, stretchy design, and extended gauntlet, the ActionHeat glove liners are meant to be worn under other gloves for added warmth.The heating elements are perfectly positioned along your fingers and thumbs so the heat circulates throughout your entire hand for complete comfort.The ActionHeat glove liners have a touch-button technology with 3 easy to use heat settings. The gloves will reach a maximum temperature of 150F 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.