Applicable Season : Autumn And Winter Applicable Scene : Trip Place Of Origin : China (Mainland) Closure Type : zipper Decoration : NONE Lining Material : Polyester Pattern Type : Solid Weight : 0.45 Sleeve Style : Regular Fabric Type : Broadcloth Model Number : 12 Closure Type : zipper Type : LOOSE Detachable Part : Hat Detachable Hooded : Yes Thickness : STANDARD Filling : COTTON Collar : STAND Style : Casual Clothing Length : Regular Material : COTTON : Aiwetin Origin : Mainland China CN : Hubei Gender : MEN 1Battery not included 2We are Asian size, 2-3 sizes smaller than European size, please choose the right size according to our size chart 3Recommend batteries model, please use batteries with high USB Power DeliveryunitWThe higher the USB Power Delivery, the higher the heating temperature.output Power (W)=Voltage (V) Current (A). for example output power 10W=5V*2A / output power 22.5W=5V*4.5A Zone 9 heating This model is an upgraded version. The heating effect is the best. It can reach the whole body heating state. There are original heating elements on the front and back. At the same time, the power consumption is also very fast. It can also produce effects at extremely low temperatures. Zone 2 heating This version is the most economical. Only the backpack and the neck are heated. It contains two heating elements. The energy consumption is the lowest. The heating time is the longest.