Description: Far infrared carbon fiberheating materialfor disinfection and deodorization Cuttablesize, you can make it the best size for you. Nice accessories for keeping warm in Winter. Solid black appearance, dirtproof and dustproof. Suitable for both men and women. Specification: Item:Insoles Gender: Unisex Type: USB, USB+Adapter Color: Black Fabric: EVA Heating material: Far Infrared Carbon Fiber Color: Black Voltage: 5V/2A Temperature: 40-50 (depending on the environment) Size:35-39, 40-44(Can be cut) Size Insoles Length Feet Length 35-3923-25cm/9.06-9.84inch 22.5-24.5cm/8.86-9.65inch 40-4425.5-27.5cm/10.04-10.83inch 25-27cm/9.84-10.63inch Package included: Type1: 2 x Shoes Pad, 1 x USB Cable Type2: 2 x Shoes Pad, 1 x USB Cable, 1x Adapter Precautions: (1) In order to avoid prolonged heating, please unplug the power supply when not in use. (2) Old people and children need to be used under supervision. (3) In order to protect the heating chip, please dont wear electric hot shoe insole to do strenuous exercise. (4) Cleaning the electric insole can be cleaned like a normal insole, and then please dry when using it. (5) This insole should be plugged in and heated to keep warm, suitable for home, office, computer family use. You can choose this insole if you dont move around. This model does not have continuous thermal insulation function.