Double Action: Hand warmers is designed to offer warm, It can also be used as a power bank to charge your electronic device at any time. Easy to Use: All you must do to enjoy all the benefits of our Hand warmers is to turn on the switch button. Three Levels: Heating feels different for everyone, which is why we wanted to make sure that you find the right temperature for you. Our hand warmers have three different temperature levels,First level:113F(45),Second level:122(50),Thrid level:131(55). Power Bank: 10000 mAh lithium rechargeable battery with USB-C charging port ensures a long using time. As a large-capacity power bank,it can be used to charge your electronic device at any time. Rechargeable: Nobody wants to waste time replacing disposable fever patch.Our hand warmer can keep heating for more than 10 hours.Fast charging,Compact and Lightweight,Match almost all USB ports. Delivery quantity: 1pcs Product colour: black Product size: 117*75*30mm