1High strength composite fiber material， can radiate infrared ray， promote blood circulation. 2Battery pocket design， with 2 dry battery boxs， portable use. 3Easy to use， high heating and strong thermal insulation performance. 4Heating temperature is about 50 constant temperature， more comfortable. 5Comfortable to wear and keep your feet from getting cold， for both men and women.Condition: 100% Brand New Item Type: Electric Heated SocksMaterial: CottonBattery: 6 x AA Batteries (Not Included) Battery Voltage: 4.5V Battery Life: DisposableSize: Feet Length: Approx.21cm/8.3inchTube Length: Approx.27cm/10.6inchUsing the new brand alkaline dry battery， can continue to work for about 4-5 hours.Usage: 1. Before using this product， first purchase 6 1.5V AA dry battery (it is recommended to use alkaline dry battery)， and each battery box contains three dry batteries.2. After the battery is installed， insert the DC head of the heating socks into the DC port of the battery box， and turn the switch on the battery box to the ON position. At this time， the LED red light on the battery box is on， the socks start to heat up， and the heating temperature is about 50. If you feel overheated or want to keep warm， turn the switch on the battery box to the OFF position to close， that is， stop the power supply. This can be kept warm for a period of time. The heating temperature varies with the ambient temperature. }1 Pair of Electric Heated Socks2 x Dry Battery Box1 x ManualDo not let children have access to batteries.If you have any discomfort， please remove the electric socks immediately and consult your doctor. Children and pregnant women should not use them until they consult their doctor.Stop using the product immediately after it encounters water， and do not continue using it until it is dried.With the warm effect of good shoes， can significantly improve the effect of electric heating.The following are only applicable to 4.5V electric socks:1. The LED light of the battery box is off， because the battery is low. Please stop using it immediately， and replace the battery.2. If you do not use the product for a long time， please keep the product in a cool and dry place.3. It is strictly prohibited to put the used battery into damp， water， fire and high temperature.Please note that the new type and old type of this product will be sent randomly， and make sure you will not mind before ordering.