Power supply : USB power supply Feature: *1. Carbon fiber heating wire, fast heating speed, high temperature resistance, corrosion resistance, fast heat conduction. *2. Waterproof and scratch-resistant fabric, abrasion-resistant and durable, and can be washed in a washing machine without fear of wind and rain .*3. Use USB universal interface, in order to ensure the best heating effect, it is necessary to ensure the use of 5V/2A output mobile power. *4. Thick inner lining, strong breathability and warmth retention performance, comfortable and delicate, soft and smooth feel, warm and comfortable to wear. *5. The power interface uses insulation and waterproof treatment, no need to disassemble, hand wash, machine wash can be done. Specification: Material: polyester fiber Color: black Size: S/M/L/XL/2XL/3XL/4XL Package Contents:Heating vest * 1 (without power supply) Note:1. All pictures are professionally color-coded, but due to the difference in ambient light and display device settings, there may be some deviations between the pictures you see and the items themselves. Please understand that.2. The data is manually measured, there may be some deviations, but it does not affect the use. SIZE:CM S: LENGTH:63 SHOULDER:39.1 BUST:51 M: LENGTH:65 SHOULDER:40.3 BUST:53 L: LENGTH:67 SHOULDER:41.6 BUST:55 XL: LENGTH:69 SHOULDER:42.7 BUST:57 2XL: LENGTH:71 SHOULDER:43.9 BUST:59 3XL: LENGTH:73 SHOULDER:45.1 BUST:61 4XL: LENGTH:75 SHOULDER:46.3 BUST:63