[UPGRADED DESIGN AND COMPACT]The upgraded hand warmer is made of high-tech aerospace grade aluminum and ABS material, with LCD (liquid crystal display) for easy portability. Non-slip surface treatment, more comfortable touch, smooth and warm, portable and compact. [Quick Hand Warming]Double-sided heating design, constant temperature 35-45-55, 3 temperature heating, warm hands, heating up in seconds, instantly release warmth for you. [Large Battery Capacity]The hand warmer is equipped with a 5200mAh lithium rechargeable battery and a Type-C charging port to ensure long-term use. It can also be used as a power bank to charge your electronic devices. The LCD screen lets you know the remaining battery capacity and heating status at any time. [Safety and Quality Assurance]The optimized circuit prolongs the lifespan of our hand warmers and provides over-discharge, over-charge, over-heat and short-circuit protection. Anti-shock, anti-scalding, anti-skid, explosion-proof, no radiation, green and healthy heat transfer. [Perfect Winter Gift]A must have hand warmer to survive the cold winter, especially suitable for the hyperthermia needs of Raynaud's arthritis patients. This device keeps your hands warm on cold days. It's beautifully crafted and comes in a beautiful box, making it the perfect winter gift for family and friends. Colour: Black Packing list: 1pcs