Portable: It is a great size, can be held, and feels soft It is to carry any pocket or bag with you when you are outdoor sport, fishing, hiking, campings, skiing, traveling or doing sport Battery capacity: 4000ma constantly warm your hands, side is heated.Quickly heat up in 10 seconds, press once to turn on the warm color To carry and go out, drop-proof design, intimate lanyard design, charging is and fast You can use a power For cold weather, commuters or workers are also great hand warmer solution Laptop to this product Please turn off the power when charging, and it is barred to use it to avoid burns use the supporting