Rechargeable Battery Heated Socks. Feature: Keep Your Feet Warm: Suitable for Indoor/outdoor. Like Skiing, Fishing, Walking, Hunting, Etc. Comfortable Heating: Micro Heating Module, Intelligent Design, Interference-free Cable Cotton Material: Natural Material, Thick and Breathable Equipped with 7.4V 2200MAH Rechargeable Battery Specifications: Hose Height: Knee-High Gender: WOMEN Finger-separated: No Sport Type: Cycling Battery: 7.4V 2200mA Lithium Polymer Battery Material: Cotton and Spandex Gender: Unisex Heating Area: Forefoot, Toes and Soles Heating Time: Lasts 2-6 Hours Color: Gray /black(same As the Picture) Charger: 8.4V 1.5A Heating Elements: Carbon Fiber Heating Temperature: 40-60 Degrees Power: 7.4V 2200mA Lithium Polymer Battery Material: Cotton and Spandex Size: Free Size: 24cm-26cm, Unisex Heating Area: Forefoot, Toes and Soles. Conditions of Use: Lasts 2-6 Hours *Color: Black/Gray (same As the Picture) Heating Mode. The Initial Color of the LED Indicates the Current State of Charge of the Battery: Red Indicates That the Battery is Fully Charged. Yellow Indicates That the Battery is Halved Green Indicates That the Battery is Low and the Battery Should Be Charged Before Use The Temperature Can Be Adjusted by Pressing and Releasing the Keyboard Control Button. (Please Press 3-5 Seconds to Turn On, when the LED Light Turns Red, then Heat) L - Green LED (36 C -40 C, Heating Time is About 5 - 6 Hours) M - Yellow LED (41 C - 45 C, Heating Time is About 3-4 Hours) H - Red LED (45 C -50 C, Heating Time is About 2-3 Hours) . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.