Feature: 1. Power: The USB interface in the zipper pocket of our hot waist bag works with a 5V, 2A power bank to generate heat and keep your hands warm. 2. Adjustable: The 3 heating levels of our heat waist bag with LED indicators can be easily adjusted at the push of a button, it is so convenient. 3. Material: Our unique thermal heating waist bag is made of velvet material and plush lining, this material is super soft, it is warm and comfortable to use. 4. Belt: Our electric warm waist bag is uniquely designed with an adjustable waist belt that allows you to conveniently wear this electric warm waist bag around your waist. 5. Scenes: Our hot belt bag are perfect for all kinds of outdoor activities like exciting camping, interesting hiking, skiing, fishing, hunting and more. Specification: Item Type: Thermal heating waist bag Material: Velvet, plushHeating Area: The middle area Interface: 5V USB Heating Temperature: 40-55℃ Power: 5V 1.2A 6W Power Source: power bank (not included) Weight: 196 g / 6.9 oz(approx.). Package List: 1 x Thermal Heating Waist Bag1 x English Manual