Size:One Size Material type:Cotton,Lithium Number of items:1 Power source:Battery Powered tech_spec_battery_description_toys:Lithium Package Dimensions:18 x 10 x 7 cm; 329 Grams Delivery information::We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. How to Use: Just put the battery on the sock. Specification: Item Type: Battery Powered Socks Material: Cotton, electronic components Gross Weight: 329g/11.6oz Size: One size fits all, removable and washable Battery Type: 2PCS Lithium battery, shipped with built in battery Power Bank: Battery voltage: 3.7V Single Power Bank Capacity: 4000mAh Output: DC 5V 2A Maximum Power: 7.5W Package List: 2 x Battery Powered Socks2 x Power Bank 1 x Data Cable Note: 1. Don't let yourself, babies, or people who aren't sensitive enough to heat. 2. Do not use in wet environment, please dry before use. 3. Use in unoccupied rooms is strictly prohibited. About this item High Elasticity: These socks are highly elastic because we achieve high tensile strength from multiple parts of sole length, toe width, sock length and sock width. Heated Quickly: The composite fiber heating filament makes the socks heat up quickly, and dozens of filaments form a piece, which is soft as silk. Through invisible knitting technology, socks do away with the traditional method of sewing heaters on socks. Premium Cotton: Socks are made of comfortable and premium fabrics, premium cotton that has delicate touch, and it is warm and breathable, skin friendly and comfortable. Easy to Clean: Socks can be washed directly, and please take out the power bank when cleaning. And lithium battery energy storage is single 4000MAH. Wide Application: Rechargeable heated socks are suitable for cold weather events or winter outdoor sports such as winter skiing, hunting, camping and horse riding. Heating lasts about 6 hours. High Elasticity: These socks are highly elastic because we achieve high tensile strength from multiple parts of sole length, toe width, sock length and sock width. Heated Quickly: The composite fiber heating filament makes the socks heat up quickly, and dozens of filaments form a piece, which is soft as silk. Through invisible knitting technology, socks do away with the traditional method of sewing heaters on socks. Premium Cotton: Socks are made of comfortable and premium fabrics, premium cotton that has delicate touch, and it is warm and breathable, skin friendly and comfortable. Easy to Clean: Socks can be washed directly, and please take out the power bank when cleaning. And lithium battery energy storage is single 4000MAH. Wide Application: Rechargeable heated socks are suitable for cold weather events or winter outdoor sports such as winter skiing, hunting, camping and horse riding. Heating lasts about 6 hours.