Rechargeable hand warmer

Rechargeable Hand warmer Can be recharged by USB port of computer and electricity power Temperature will be about 38(low gear)-42(high gear) and it can be used for about 3.5 to 4.5 hours to warm. with a polymer battery(3.7,1000mA) 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 5-8 seconds . It can be recharged over 500 times There is a protecting device in the warmer avoiding danger of the battery Big space for customer to print logo With an USB cable Input power:5V,500mA Package details: Color box Product size:3.5x2.5x7cm Carton size:34x28x37.5cm 60 pcs/ctn G.W/N.W :7.5/6.5kgs/carton Trade terms: MOQ:500 pcs ,FOB Shenzhen by T/T,30% deposit ,70% balance paid before shipment. The sample lead time is about 3-5 days. The delivery time is about 10 days .