USB Rechargeable Electric Hand Warmer

Product information:

Power supply mode: USB
Rated voltage: 5V
Rated power: 7-10
Heating method: self-heating
Hot water bottle material: aluminum alloy
Whether built-in battery: Yes
Built-in battery capacity: 4000 mA or more
Battery life: 1-3 hours
Specifications: 4000 mA, 6000 mA
Fever time: 2 to 6 hours
Other materials: aviation aluminum

Packing list :

Hand warmer *1