WinterLess™ USB Heating Vest Warm Vest Charging Smart Heating Heating Clothing Vest Constant Temperature Warm Waist Protection Men's And Women's Clothing Adjustable length and bust : It has a length adjustment button and a width adjustment zipper, divided into 2 sizes. Unisex. You can adjust the length and width of the clothes according to your needs, suitable for most teenagers and adults. 7-zone heating: Including: abdomen*2, shoulder*2, back*1, waist*2, 7-zoe heating, one-key heating, three-level temperature control, intelligent heating in winter for people who are afraid of cold, heating in all directions, No longer be afraid of cold in winter. Three temperature settings : high-speed: 65°C (red light), mid-range: 55°C (white light), low-end: 45°C (blue light); one-button heating allows you to according to your needs and environment Choose a suitable temperature range. Safety and Energy Saving: Use a 5V low voltage that is harmless to the human body. It is made of Graphene fiber yarn, no harmful radiation, soft material, stable performance, environmental protection and energy saving, safe and reliable. [Note]: Must be used with mobile power adapter. This product does not contain. It uses a USB interface to keep you warm when you go out. US Size Bust Length Approximate Weight M 98-120cm 55cm-59cm Male :40-75kg Female : 45-70kg L 118-132cm 57cm-61cm Male :75-110kg Female : 70-90kg