1) Dimension:90.7*66*20.4 mm
2) Input: 5V,1A(Max current)
Output: 5V,1A(Max current)
3) Charging Temperature range:

This product is a handy warmer & mobile charger 2 in 1 which has built-in Li-Batteriy .At the first time of using or after longtime leave unused ,please charge it before using.Care for low temperature burn.
Built-in Li-Battery is rechargeable .Their capacities will still up to 80% of standard capacities after 500 times charging.

This product is controlled by microcomputer chip, is designed after comprehensive consideration of temperature that can cause low-temperature burn.

3)  Charging Temperature range:  0°C~40°C
4)  Use Temperature range: -10°C~40°C
5)   Built-in Battery : Li-batteries 3.7V 2600mAh
6)   Charging time :About 5 hours(With standard USB equipment)
7)  Heating time : about 7-10 hours
Temperature of  Heating part : Average temperature  38°C-41°C

8)  N.W: 90g