Feature:
4000mAh Large Capacity: Our heated socks have 12 long working hours and the 3.7V/4000mAh batteries are rechargeable by type-c cable which is included. With 3 heating levels, you can switch it according to your need.
Wide Warming Area: The U heating cords are evenly distributed across the top and bottom of the heated socks, the whole sole and the top feet can feel the temperature within 1 minute, and the warmth will be up to your calves, too.
Stretchy & Soft: The size is 7.1x12.6x3.9 inch and the thickness is 2.5mm, which makes the electric socks work for your current shoe size. With stretchy cotton, both men and women can wear them without worrying about the size.
Suitable for Winter Activities: The rechargeable heated socks are great for Arthritis,  stiff joints. They can keep your feet warm all day while hunting, skiing, camping, and all winter sports and activities.  
3Adjustable settings
Level 3-140-1499F(6-7)hours
Level 2-122-1319F(9-10hours
Level 1=104-1139F111-12lhours 
Package:(Depend Your Choose)1 X Type-C Charging Cable, 1 X Pair of Heated Socks, 1 X User Manual, 2 X 4000mAh Battery  1 Just only a Pair Socks