x 1.9 Heating zones:back, neck, shoulder, waist, both sides of the abdomen.When the power is turned on, the whole body can feel the warm. x 2.1 Minute fast heat, dispelling cold and keeping you warm. x 3.Set the temperature you want to respond to a variety of environments. x 4.A button to heating, three stall temperature control, intelligent heating. x 5.It can be washed by machine and can be washed by hand. Do not wring it by hand. x 6.General USB interface power supply, longer service life, anti water splashing and washable. x 7.The fashion is warm, comfortable and breathable, and it's a good partner for your winter going out. Specification: 1.Style: Sleeveless Vest 2.Material: Polyester 3.Color: black/blue 4.Size: S/M/L/XL/2XL/3XL/4XL Size Length Bust Shoulder Neck S 63/24. 80 102/40. 16 39/15. 35 7.5/2.95 M 65/25. 59 106/41. 73 40/15. 75 7.5/2.95 L 67/26. 38 110/43. 31 42/16. 54 7.5/2.95 XL 69/27. 17 114/44. 88 43/16. 93 7.5/2.95 2XL 71/27. 95 118/46. 46 44/17. 32 7.5/2.95 3XL 73/28. 74 122/48. 03 45/17. 72 7.5/2.95 4XL 75/29.5 126/49.6 46.3/18.28 7.5/2.95 5.Power Supply: 5V/2A Mobile Power(Not Included) 6.Temperature Shift(Manual adjustment) 7.Warm:45 (Red Light) 8.Comfort:35 (White Light) 9.Energy Saving:25 (Blue Light) Package Contents: 1 x Heating Vest(Mobile Power Not Included) Note: IT is Asian size 1.All pictures are professionally color-coded, but due to the different ambient light and different display device settings, there may be some deviations between the pictures you see and the items themselves. Please understand. 2.The data is measured manually, there may be some deviation, but it does not affect the use. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.