cocolona Plus Size Heated Vest Winter Warm Sleeveless Print Heated Hvyesh Fleece Heated Jacket for Women and Men Full Zip Stand Collar PVCS Heated down Warm Jackets for Women Rechargeable USB Heated down Women Sailwind Heated Jacket & Heated Vest. This is an intelligence vest for you. 1. The core heating technology has reached the international CE, EMC, ROHS, IP certification, and all testing certificates are complete. 2. Fabric 20D nylon plus waterproof treatment. Production is a series of down cotton, not simple cotton. 3. Specifications and manufacturing requirements are in line with domestic brand standards With mobile power storage pocket, easy travel. v1 minutes fast heat, dispel cold and keep you warm. Set the temperature you want to respond to a variety of environments. A button to heating, three stall temperature control, intelligent heating. It can be washed by machine and can be washed by hand. Do not wring it by hand. General USB interface power supply, longer service life, anti water splashing and washable. The fashion is warm, comfortable and breathable, and it's a good partner for your winter going out. How To Use: 1. Take out USB plug 2. Plug in removable charger 3. Switch on the removable charger 4. Press the chest temperature control switch for two second 5. Red light flashing, means heating automatic 6. After red light flashes for 5 minutes, then automatic turn to white light, means medium temperature 7. Manual adjustment has three level, red light means high temperature heating continuously. White light means medium heating continuously, blue light means low heating continuously 8. Press the chest temperature control switch for two second, lights out and stop heating Temperature Shift (Manual adjustment) Warm: 45 (Red Light) Comfort: 35 (White Light) Energy Saving: 25 (Blue Light) Specifications Style: Sleeveless Vest Material: Polyester Color: Black, Blue Size: M L XL 2XL 3XL Power Supply Interface: USB Function: Keep warm, Anti water splashing and Prevent cold Package Included: 1X Sleeveless Vest(Mobile Power Not Included)