Each hand warmer has one side heating, press the switch and it releases warmth in 2 seconds! There are 3 temperature settings of 104 ° F (low) / 122° F (mid) / 131 ° F (high) to meet your different choice, keeping your hands warming 4-7 hours each pack. It's a perfect reusable hand warmer for a commuter or hunter in the cold weather. 5000mAh capacity can give a full charge to mainstream digital devices on market, such as for , Galaxy, other Android phone, and other electronic devices via USB cable. WISH TAG:hand warmer,hand warmers rechargeable,rechargeable hand warmer,hand warmers,hand warmers rechargeable Made of high-tech aircraft-grade aluminum and ABS material, thousands of polished exterior material, smooth and warm, portable and compact as well anti-skid in one hand. hand warmers rechargeable, one for each pocket when you are doing outdoor sports, hunting, golf, dog walking, camping, or share with your friends or family. Hand warmers rechargeable to surprise your parents, kids, friends, family, girlfriend and anyone you cared about. With a best gift for Christmas, Birthday, Thanks Giving Day, Valentine's Day and such important festival. This high-tech warmer gift not only can make her/his heart warm, but also her/his hands., Weight: 0.80248263368 pounds, Manufacturer: Wesafrae