ITEM NAME:1 Pair Winter Heating Insole Warm Carbon Fiber Heating Insoles Outdoor 4.5V T2P4 1 Pair Winter Heating Insole Warm Carbon Fiber Heating Insoles Outdoor 4.5V T2P4 Function: Foot Warmer Applicable Gender: Unisex Maximum Voltage: 4.5V Battery Box: 3X AA Batteries (Not included) Temperature: About 50 Celsius (at room temperature) Heating Range: Within 35 Shoe Line Brand New and high quality. Easy to cut to the size you need. Applicable to various shoe types. Make your foot more comfortable and warm. Battery compartment designed line PCB, contained three ICs for power. Intelligent battery recycling and independent line control IC battery safety. Battery box can be placed on the outside of the wearer's bag, easy to carry. colour:black Material:carbon fiber size:Insole Thickness: 5mm / 0.20 inch(appr.) Insole Cable Length: 34cm / 13.39 inch (appr.) Insole Overall Size: 30x10x0.5cm / 11.81 inch x3.94 inch x0.20 inch (appr.) Battery Box Strap Size: 36x11cm / 14.17 inch x4.33 inch (appr.) Suitable For Shoes Size (EUR): 35-45 Package Contents: 1* Pair Heated Insoles 2* Battery Box (Battery Not Included) 2* Straps Warm Tips: Please use alkaline batteries or rechargeable batteries. The old and the children need to be used under guardianship. It is strictly Prohibited to do strenuous exercise when wearing the heated insoles to protect the heating chip..1 Pair Heated Insoles. It is strictly Prohibited to do strenuous exercise when wearing the heated insoles to protect the heating chip. Material:carbon fiber. Heating Range: Within 35 Shoe Line. Make your foot more comfortable and warm.