Intelligent safe heating - safety is our priority. We use a premium chipset to control the heat grade, no liquids and flame ant materials to ensure product safety. From 104F to 140F there are 3 heat levels to choose from with a simple button. Luminescence Hand Warmer - Innovative Luminescence Electric Hand Warmer, Adjustable with 7 Colour Breathing Lights. Fashionable electric pocket warmer. Suitable for men and women. HEAT LONGER THAN EVER BEFORE - The C310 series offers much longer battery life than previous generations, with an incredibly large 10000mAh battery, maximum power and minimal weight gain. It can provide up to 18 hours of heat. In addition to warming the hands, electric pocket warmer can also be used as a power bank. True comfort - double-sided heating, quick heating in 3 seconds. The body is made of aircraft aluminium and ABS and is crash and pressure resistant. Pocket warmer hand warmer also has a practical size of pocket, elegant and light weight to carry anywhere for you when doing sports, fishing, hiking, camping, skiing. That's just all you need. Perfect winter gifts - electric hand warmer USB power bank can help you keep your hand warm and charge your phone. Perfect for outdoor sports and events, offices, travel, indoor games and for Raynaud's arthritis sufferers who need heat therapy. Warm the hands of the people you love and send the warmth to their hearts.