Come and see our amazing products. The mini body shape makes the hand warmer easier to fit into your pocket, and the warmth helps relieve menstruation, Raynaud's disease, joint pain, skin cracking and frostbite.It is the perfect gift for sports enthusiasts such as climbing, hiking, travel, camping, skiing,etc. No longer face the embarrassing scene of no electricity.Safety is our priority. We use premium chipset to control the heat levels, no liquids, and flame retardant materials to ensure product safety. Fast heating in 3 seconds, electric hand warmers is made of high-tech aluminum, with a pebble-like smooth touch. Double-sided heating keeps your hands warm at all times, creating a warm world for you in winter.Used as a power bank, rechargeable hand warmer built-in 5000mAh lithium ion battery.Customized design is available Pls confirm further with us if any query about packing info, inventory status and time schedule.