The Rechargeable Dual Palm Hand Warmer is a set of 2 rechargeable hand warmers that can also be used as a power bank with a capacity of 2x 5000mAh. The warmers have magnets on the flat side so you can connect the warmers together. By pressing the Power button you can choose from 4 levels for heating between 40°C and 50°C. The Lifesystems Rechargeable Dual Hand Warmer works reliably indoors and outdoors, and the run time is between 6 and 9 hours. The power bank function with a capacity of 2x5000mAh can be used for all devices with USB connection. We recommend recharging the battery at least once every 3 months to maintain the battery capacity. You can warm up both hands without having them next to each other. The 3 stage heating has a 50 degree Celsius temperature so you should be careful if you have sensitive skin. USB-C charging cable is included.