Features: 100% brand new and high quality Made of high quality cotton and elastic fiber, thickened warm and comfortable to wear, absorbent, breathable. Style A: heated sock comes with two 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: the maximum temperature can reach 50 C. 3 settings temperature controller. Low temperature 40 C, mid-range temperature 45 C, high temperature 50 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. Specification: Material: 90% Cotton+10% Elastic Fiber Battery Capacity: 2200mAh Output: 3.7V-2.0A Input: 5V-0.1A Charging Time: about 3.5 hours Using Time: 6-7 hours after fully charged(depending on frequency of use and temperature setting) Power Supply: 2 x Rechargeable Battery(Included) Heating Temperature: 40-50 Recommended Foot Size: 34-44 Package Length: app. 29cm/11.42in Foot Bottom Length: app. 23cm/9.06in Optional Style: A With Batteries, B Without Batteries Optional Color: Black+Gray, Black, Gray+Blue, Gray+Black Quantity: 1 set Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Please note that low temperature washed,do not bleach and place under the blazing sun for quite a long time. Package includes: Style A: 1 pair(2pcs) x Heated Socks + 2 pcs x Rechargeable Battery Style B: 1 pair(2pcs) x Socks (other accessories demo in the picture are not included)