About this item 2 IN 1 MAGNETIC - The twin hand warmers are connected together by strong magnets but can be easily separated when necessary. You can combine them into a palm-sized hand warmer, separate them to slide them into pockets, hold one in each hand, and share a heater with your family. DOUBLE-SIDED HEATING & 3 LEVELs- The rechargeable hand warmers are used in High-tech chips to improve thermal conductivity and make dual-sided heating more evenly. 1 button to instantly switch 3 levels of temperature (113/122/131℉). In addition, the temperature display 3 indicator lights help to identify the remaining power. The reusable hand warmer is an essential heating tool for your airplane/travel/outdoor sports. Multifunctional and Best Tech Gift - Quick Hand Warmer and Power Bank 2 in 1. Not only is it a small hand warmer, it's also an emergency battery backup. Great gift for girls, kids, youth, boys, men, women, seniors. Large Battery Capacity - 10000 mAh Lithium rechargeable battery with Type-C charging port to ensure long time usage. It can also be used as a power bank to charge your electronic devices anytime. EXQUISITE AND COMFORTABLE - Made of high-tech aerospace grade aluminum and ABS material, thousands of polished exterior materials, smooth and warm, portable and compact, non-slip in one hand.