Instead of splitting one into two single sided heated hand warmers, you will have two separate double sided heated hand warmers for double the warmth 2S rapid heating, double-sided heating effect makes you feel twice as warm, ergonomically designed shape, bringing you a more comfortable hand grip experience Electric hand warmers built-in with LED display to displays remaining power that relieve the anxiety caused by low battery. It also displays the 3 heating levels. with heat up to 131℉ It built-in LED light, You can switch between different light levels, and there is also has the characteristics of flashlight and SOS,It can be used for illumination and emergency use. Suitable for outdoor sporting, fishing, hiking, camping, skiing, travel, and walking the dog in cold weather