Features: 100% brand new and high quality Made of high quality cotton, elastic, thickened warm and comfortable to wear, absorbent, breathable. Each heated sock comes with a 3.7V 2200mAh rechargeable lithium polymer battery. Suitable for men and women. Long tube cotton socks can cover the calf, widely matched, warm and stylish 3 temperature settings: heated by carbon fiber filaments, the maximum temperature can reach 55 C. 3 settings temperature controller. Low temperature 35 C, mid-range temperature 45 C, high temperature 55 C. There is a battery bag for the battery. An ideal solution for winter problems such as long-term cold, poor blood circulation, and arthritis. It is ideal for outdoor sports such as hunting, skiing, fishing, hiking and any other outdoor sports. 1 pair of socks+2 rechargeable battery only, other accessories demo in the picture are not included Specification: Material: Cotton Battery Voltage: 3.7V Charging time: about 3.5hours Using Time: about 4-5 hours(depending on frequency of use and temperature setting) Battery Capacity: 2200mAh Heating Area: Bottom of the Foot Power Supply: 2 x Rechargeable Battery(Included) Heating Temperature: 35-55 Length: app. 46cm(18.11in) Optional Color: Black, Gray Quantity: 1 set Warm prompt: 1.Asian people size is 1 or 2 sizes smaller than European and American. 2.Please note that low temperature washed,do not bleach and place under the blazing sun for quite a long time. 3.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 4.Because of different monitors and lamplight,the picture may not reflect the actual color of the item,really thank you for your kind understanding Package includes: 1 pair(2pcs) x Heated Socks 2 pcs x Rechargeable Battery(without retail package)