As the first and leading brand in the field of electric hand warmers, OCOOPA has been specializing in technical research and development since our establishment.This HotPal hand warmer is made of high-tech aircraft-grade aluminum and ABS plastic, our hand warmers are durable, portable, and anti-skid, making them easy to hold and use. Fast Heating with 3 Temperature Levels - Choose from 95-107°F/104-118°F/118-131°F to Suit Your Needs. HotPal hand warmer with a 5200mAh lithium rechargeable battery and USB-C charging port, you can use your hand warmer for hours and even charge your electronic devices on the go. Reusable, less waste versus disposable warmers. If you're using hand warmers every day, they can get costly over the long run. The cost of about 60 disposable hand warmers can get you an Ocoopa rechargeable hand warmer, which can be reused hundreds or even thousands of times, and enables you to adjust the temperature. It not only helps you to save money but also reduces waste generation. Give the gift of warmth and comfort on Christmas, birthday, promotion celebration or any occasion with Ocoopa HotPal hand warmers - ideal for anyone suffering from Raynaud's, or anyone who loves spending time outdoors.