The ToughTested Hand Warmer/Power bank combo is the ideal accessory for your outdoor cold weather activities.Emergency Power:3600mAH rechargeable battery provides enough power to fully recharge your device via the USB A port.3 temperature settings:Hand warmertemperature settings are 92, 104 & 122 degrees Fahrenheit (or: 35, 45 & 50 degrees Celsius).Metallic Housing:Smooth Metallic housing provides great feel and DurabilityThe Toughtested Hand warmer is powerful and compact making it theperfect companionfor ALL your cold weather outdoor activities ie: Sporting Events, Hunting, Camping, Ice fishing, All Snow Sports+more.WARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov