Their split magnetic design warms both hands separately, and with 3 heat settings, you control the warmth. Plus, they double as a power bank for your devices. These compact hand warmers provide up to 9 hours of heat and charge via USB for ultimate convenience.·      Spilt magnetic design ·      2x 5000mAh battery capacity ·      Compact design and easy to operate - 3 heat settings ·      Provides 6-9 hours heat* ·      Rapid start (heats up in 10 seconds) ·      Charging LED indicators ·      Power bank function ·      USB rechargeable ·      USB-C cable included ·      Port cover