Feature: 1. [All Round Heating] There are ten heating pieces in the vest, covering most places, giving you all round warmth and care. 2. [3 Temperature Adjustment] The vest can be heated with one button, with three speed temperature control, intelligent heating. 3. [Waterproof] The waterproof of this vest is class 3, which has a certain waterproof effect and can be worn with confidence. 4. [Infrared Heating] The heating film adopts imported carbon fiber heating wire, which is infrared heating and does not harm the human body. 5. [Warm and Cozy] This heating vest can be paired with any outfit and is suitable for winter wear, warm and comfortable. Specification: Item Type: Heated Vest Material: Polyester fiber Operating Temperature Range: About -5℃ to 40℃ Waterproof Class (IP): Class 3 Power Supply: 5V/2A mobile power supply (excluded) Temperature Change: Manual adjustment Warm File: 45℃ (red) Comfort Mode: 35℃ (white) Energy Saving Gear: 25℃ (blue) Uses: Fashionable, warm, comfortable and breathable, it is a good companion for going out in winter. How to Use: Pluginthepowerbank,pressandholdthepowerbuttonfor3secondstostartpreheating,andthenadjusttomediumtemperature.Whenitishot,youneedtoconnectthepowerbankallthetime. Package List: 1 x Heated Vest Note: 1. The size corresponds to the Asian size, and the European and American sizes need to be two sizes larger.2. instructions: It can be machine washed or hand washed, please do not wring it out by hand.