[Double-Sided & Rapid Heating]Rechargeable hand warmer adopts double-sided heating design, fast heating up in 3 seconds. Constant [104~113 Fahrenheit (40~45 Celsius)], [113~122 Fahrenheit (45~50 Celsius)], 122~131 Fahrenheit (50~55 Celsius)], 3 levels of temperature can be adjusted to warm your hands in the cold winter. [10000mAh Large Capacity]Newest fashion for winter 2021, quick hand warmer with USB-C charging port, 10000mAh upgrade high capacity can provide continuous heating for 6-10 hours, long using time. With enough capacity to provide more than two charges for your electronic device at any time, which is the perfect portable charger on the travel. [ & Smooth ]Pocket size(112x64x33mm), comfortable and small, suitable for your hands to hold. Safetable and smooth warm , easy to carrying anywhere while sporting,fishing, hiking, camping, skiing, travel or play outdoors sports. [How To Use & Imporabt Notice]Keep press the power botton in 3 seconds and instantly release the warmth ,single -click flashlight,double-click display power,three-click vibratio massage. Be used to warm hands,waist, stomach, feet and knees in low temperature environment. Please do not chraging and heating simutaneously,please from water and fire. When in high temperature, please do not Press it with skin directly to prevent . [Great Gift for Her] Best Gift for your love, when the menstrual period of the goddess comes (vibration massage helps to recover the menstrual period and warm the palace, 40 Celsius warm palace, 50 Celsius menstrual care, 60 Celsius dysmenorrhea gospel). Colour:black Material:ABS+Aluminum Alloy Package Contents: 1 x Hand Warmer 1 x USB Charging Cable 1 x Portable Cloth Pouch 1 x Chinese and English manual 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.