Label:Yes Color: Purple,Green,Red,Pink Voltage: 5V 2Amax Temperature:42-55° Name:Hand Warmer Charing time:3-4hours Use Time:1-3hour Size:80*79*32.6mm Battery:3000mAh Material:ABS Feature: 1. more→Double-sided heating, you can choose the best temperature according to your needs, and keep your hands warm even on cold days. 2. USB charging is fast and convenient. . 3. The two-in-one hand warmer can also be used as a mobile power bank to charge your mobile phone. It can be carried with one hand or placed in your pocket. It can be used to warm your hands,feet, knees, and belly. You can take it with you when you are exercising, fishing, hiking, camping, skiing, traveling or outdoor