1,usb foot warmer shoes 2,Input power 2.5W+0.5W 3, ... , plush 4,size,36-45 Temperature,40-45 Name,usb foot warmer shoesModel No UWS-001Input Voltage PC-USB/5V Input ... , when the environment temperature is 5°C--10°C,this foot warmer can warm up to 35°C or so within ... . Suggest that in this cold season you should buy. usb foot warmer shoes