❄Description:Brushed soft comfort for feet,elasticity.Manual control of temperature: High, Middle, Low.The socks with box can be as a best warm heart gift for Family,Parents,Friend in Cold Weather.Perfect indoor warm feet gear for cold weather. Also great for outdoor athletic activities-outdoor trail.❄Specifications:Color: Gray,BlackMaterial: CottonInput: 5v 2AOutput: 5v 2ASize: S(length20~23cm),M(length23~25cm),L(length25~26cm),XL(length26~28cm)Application: Winter/UnisexHeated Area: Front instep, ToeBattery: 2 x 3.7V rechargeable li-ion batteries（2200mAh）❄Package Included:1* Pair of Heated Socks2* 4000mAh Rechargeable Batteries1* USB Dual Charge1* Manual❄Notes:Please check the detail size/model information before purchasing.Due to the different monitor and light effect , the actual color of the item might be slightlydifferent from the color showed on the pictures . Thanks for your understanding.Please allow 1-2 cmmeasuring deviation due to manual measurement.