1,usb foot warmer shoes 2,Input power 2.5W+0.5W 3,Meterial ... ,size,36-45 Temperature,40-45 Name,usb foot warmer shoesModel No UWS-001Input Voltage PC-USB/5V Input Power 2.5W+0.5W ... applied, USB power, 5 voltages, power, 2.5W*High efficiency, when the environment temperature is 5°C--10°C,this foot warmer can warm ... price. Suggest that in this cold season you should buy. usb foot warmer shoes