This heated sock is a must-have for outdoor activities in winter. With built-in heating wire and three-level temperature control, you can enjoy a warm and comfortable experience whether you are skiing, cycling, or indoors. Battery and battery box styles are available to meet different needs.Features:Built-in heating wire, providing lasting warmth.Three-level temperature control, you can adjust the temperature as needed.Battery and battery box styles are available to meet different needs.Warm and comfortable fabric, comfortable to wear.Suitable for skiing, cycling, indoor and other occasions.Specifications: Colour: Black&GreyModel: Battery style / Battery box style(Optional)Material: Warm and comfortable fabricBattery style equipped with 2200mAh battery, Battery box style needs to prepare 6 AA batteries by yourself Size: 22.5*33cm /8.8*13inchGender Size：Men 6.5-12, Women 5-8.5Package Size: 23*12*6cm/ 9.1*4.7*2.4in Package Weight: Battery style 355g / 12.5ozBattery box style 265g / 9.3oz Package list: Battery style: A pair of heated socks, A pair of 2200mAh batteries2 data cables Battery box style: A pair of heated socksA pair of battery boxes