Feature: 1. 3 Levels Temperature: Heated vest has 3 levels temperature adjustment, with energy saving level of 30℃ for blue light, comfortable level of 40℃ for white light and warm level of 50℃ for red light. 2. Quick Heating: The electric heated vest can be heated quickly in 3 seconds, and can be heated without waiting. It can be opened by pressing for 3 seconds. 3. Multi Purpose: USB heated vest is suitable for cold protection, women's warmth, street work, winter travel, outdoor duty and so on. 4. 9 Zones:Heated vest adopts humanized heating part design and 9 zones heating design, and heating blocks are designed for the neck and back vulnerable to cold. 5. Long Life: Electric heated vest has a voltage of 5V, 10000 mA, and keeps heating for 8 hours. It is easy to operate and can adjust the temperature at will. Specification: Item Type: Heated Vest Material: Polyester Fiber Number of Levels: 3 Levels Blue Light Energy Saving Level: 30℃ White Light Comfort Level: 40℃ Red Light Warm Level: 50℃ Uses: Daily Work for the Elderly, Working Overtime to Prevent Cold, Keeping Warm for Women, Street Work, Winter Travel, Outdoor Duty and So On. Size: L: Chest: 110cm / 43.31in,Length: 67cm / 26.38in,Shoulder: 41.5cm / 16.34in,Collar:7.5cm / 2.95in XL: Chest: 114cm / 44.88in,Length: 69cm / 27.17in,Shoulder: 42.7cm / 16.81in,Collar:7.5cm / 2.95in 2XL: Chest: 118cm / 46.46in,Length: 71cm / 27.95in,Shoulder: 43.9cm / 17.28in,Collar:7.5cm / 2.95in 3XL: Chest: 122cm / 48.03in,Length: 73cm / 28.74in,Shoulder: 45.1cm / 17.76in,Collar:7.5cm / 2.95in . Package List: 1 x Heated Vest Note: 1. Shipped without power bank, it can be machine washed. Clothes are put into laundry bag for washing, and choose machine washing gentle mode. 2. If you wash by hand, don't wring it out and rub it hard. Matters needing attention: 1. Please don't access the power bank if you don't use it for a long time.2. Do not use hot water or strong acid detergent. 3. It is strictly forbidden to use electricity for wet clothes. Please turn off the power supply and stop using it when you get wet in the rain. 4. The use time depends on the power bank capacity.