Product Name: SAVIOR Heated Socks Rechargeable Battery Heated Thermal Socks Winter Foot Warmers for Man and Woman Model NO.: SHS034 Season: Winter Thickness: Thickening Feature: Breathable, Eco-Friendly, Thermal, Anti-Slip, Deodorization, Anti-Bacterial, Disposable, keep warming,sweat-absorbent Style: Stockings Height: Tall Material: Cotton Gender: Unisex Age: Adults voltage: 7.4V 2200mAh temperature: 35-65 degrees Duration: 4-10 hours Color: Black,Grey,Red&Black etc Customized: available Trademark: SAVIOR Transport Package: PE Bag, Carton Box, Waterproof Specification: 98 % Polyester, 2% Elestic Origin: China HS Code: 6111200010 Product Description Product Type:Heated sockMaterial:cottonHeat Technology:Far infrared carbon fiber technologyBattery:3.7v Li-ion batteryheating time:3-6 hoursheating area:Fore foot and Toeslevel control:usb controlFit for:winter,old people,outdoorBrand:SAVIORHeating Mode.The initial color of the LED light indicates the present charging status of the battery:RED indicates that the battery is fully charged.YELLOW indicates that the battery is halve charged andGREEN indicates a low battery level and that the battery should be charged before use!The temperature can be adjusted by pressing and releasing the keypad control button.L - Green LED (34°C-39°C with approximate heating time of 4 - 5 hours)M - Yellow LED (39°C-44°C with approximate heating time of 3 - 4 hours)H - Red LED (44°C-50°C with approximate heating time of up to 2 hours)Please note that the actual heating time always depends on the outside temperature . The Li-Ion batteries reach its full power after having been fully charged and fully drained several times! Additional batteries packs can be purchased separatelyif extended heating times are needed!Turn OFF the socks by pressing the ON/OFF keypad control button several seconds until the LED light turns off. Always unplug the batteries when the socks are not in use and store them inside the pouch of the SocksThe high-quality 5V 4000 mAh Li-Ion Polymer Batteries (no memory effect!) cannot be damaged by frequent charging and can be re-charged approximately 500 times!Specifications:*Material:Cotton and Spandex*Size: Free size:24cm-27cm,unisex*Heated area:Forefoot, and toes and Soles of the feet.*Use condition:Lasting for 5 hours*Color:Gray (same as Picture)Package Included:(Without Retail package)*1 x heated socks*2 x Batteries*1 x AC Charger