Mini fever hand warmer

Specifications:

Material: aluminum alloy + ABS
Battery capacity: 10000 mAh
Size: 110×63×33mm
Charging time: About 4 hours
Input / Output: 5V / 1A
Usage:

Press to turn on and power consumption is shown.
Press twice for entering the flashlight mode, and turn it off by pressing twice.
Press 3 times for entering massager mode, and turn it off by pressing 3 times.
Long press for entering the hand warmer mode, press 1 time for choosing temperature level, long pres to turn off.