These Dual Palm Rechargeable Hand Warmers have a split magnetic design which allows you to warm both hands without having to have them next to each other. With 3 heat settings, you are able to easily adjust the hand warmers to the ideal temperature for you and the conditions you are in. The USB-C cable allows you to charge your mobile from the hand warmers, meaning you can stay connected while out adventuring. At the touch of a button, the rapid start will deliver heat for up to 9 hours. The hand warmers can easily be recharged by using the mains or USB.