Hot sell USB hand warmer in Winter

Description

• Can be recharged by USB port of computer and electricity power
• Temperature will be about *0 °C(low gear)**0  °C(high gear) and it can be used for about 3 to 4.5 hours to warm.
• with a polymer battery(3.7,***0mA) inside that is rechargeable, need to charge up to about 2.5 hours when its power is empty
• It can be heating soon ,only for **8 seconds .
• It can be recharged over **0 times
• There is a protecting device in the warmer ,avoiding danger of the battery,use safely and easily
• Big space for customer to print logo ,OEM is welcome.
• Input power:5V,**0mA