Specifications: Color: Camouflage Size: M, L, XL, XXL, 3XL, 4XL (Follow the size chart to select please) Material: Polyester+Cotton Gender: Unisex Adults Input Voltage: 5V Power Supply Interface: USB Sleeve Length: Sleeveless 5 Heated Area: NeckBackBelly Function: Keep Warm, Water Repellent, Wear Resistance, Washable 3 Modes Temperature: Warm: 45 (Red Light), Comfort: 35 (White Light), Energy Saving: 25 (Blue Light) Lasting Time: 8 Hours (10000mAh) (Depending on the setting and battery capacity) Features: 1. Adopted infrared heating material, which is heat-resistance, wear resistance and can warm up rapidly. 2. Soft and warm inner fabric offers you great comfort. 3. Three gears temperature control, red led for high gear, white led for middle gear, blue led for low gear. 4. This vest will start heating in seconds when powered on. its widely compatible for outdoor skiing, winter fishing, mountain motorcycle, bicycle, camping, snow hiking, hunting, outdoor attendance, winter street, office daily, etc that meets all your needs. How To Use: 1. Take out USB plug. 2. Plug in power bank. 3. Switch on the power bank. 4. Press the chest temperature control switch for 3 seconds. 5. Manual adjustable three level temperature. 6. Long press the switch or take out the power bank, lights out and stop heating. Washing Instructions: 1. Take out the power bank. 2. Do not force knead or beat. 3. After nature air drying can be use. 4. Machine wash & hand wash are available, make sure it is dried before heating. Package Included: 1 x Electric Heating Vest 1 x Power Bank Note: 1. Please allow 1-2cm measuring deviation due to manual measurement. 2. Due to the different monitor and light effect, the actual color of the item might be slight different from the color shown on the pictures. 3. Batteries, connecting plugs and chargers should aviod contact with water during operation. It should be used in completely dry condition. 4. Please DO NOT disassemble, modify the heating film and control circuit, to prevent man-made damage to hot components. 5. The cable is waterproof, can be washed. 6. Always connect it to the power bank when heating.