With excellent ergonomic design, it is a nice size to hold in hand and portable to put it in your pocket. Smooth and double-sided warm , gives you warm in cold winter. As the of Christmas Day and New Year, it is a great festival gift for your families and friends. Equip with 10000mAh Polymer Lithium rechargeable Battery, which makes the device maximum energy and . This long lasting and hand warmer can provides up to 12 hours heat. And can be used as a phone charger to charge your electronic device at any time. This heater is made of Aviation Aluminum Alloy, Environmental ABS, Polymer Lithium Battery. Premium chip ensures its . Instead of a bunch of hand warmer packs, it is more environmental friendly. What's more, it can be used as a backup battery in outdoor. You can use the hand warmer at skiing, hunting, fishing, camping, hiking, jogging, gardening, walking dog or outdoor sporting events. 3s quickly heat up. By a simple button, there are 3 levels of heat 104 Fahrenheit, 122 Fahrenheit, 140 Fahrenheit to choose from. In addition, a portable pouch can be used to avoid scalding. Colour:As shown Material:Aluminum alloy + ABS Size:13.5cm x 8.8cm x 5cm Package Contents: 1 * hand warmer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.