Temperature Adjustable: Rechargeable hand warmer has two temperature settings. Press and hold the button to heat up in seconds. Low temperature 35-45, high temperature 50-60. You can choose the right temperature to enjoy the warmth. Fast Heating ; Led Digital Display: The hand warmer heats up in 3 seconds, giving you instant double-sided heating. At the same time, the portable electric heater also has an LED display that shows the temperature and remaining power. 2-in-1 Power Bank Hand Warmer: It is not only a handheld heater, but also equipped with a 5200mAh large-capacity lithium battery, which is a power bank that can charge mobile devices for 3 hours and lasts 3-6 hours, can easily charge your phone or tablet. Safe And Durable: Rechargeable hand warmer is made of high-tech aluminum alloy and ABS material, environmentally friendly polymer battery, with shockproof, anti-scalding, anti-explosion, anti-overheating, anti-short circuit protection and other functions. Safe to use and guarantee the longevity of our hand warmers. Wide Application: Rechargeable hand warmer is small and portable, you can take it anywhere. It can warm your hands, feet, waist, stomach and knees in winter, perfect for outdoor sports and activities, office, travel, indoor games and dog walking, it is for Christmas, Thanksgiving, family gatherings and birthdays Perfect gift.