Thank you for viewing. I purchased this on Rakuten and have kept it stored at home without using it. 3-level temperature adjustment TYPE-C Heated Earmuffs Ear Muffs Ear Warmers for Men and Women with Heater 3-level temperature adjustment Usable for up to approximately 8 hours USB rechargeable Built-in battery Heat retention effect improved Doesn't hurt ears, doesn't slip easily Heated ear muffs Ear covers Fleece lining Unisex For motorcycles, skiing, fishing, commuting, school, snow work, outdoor work, freezer work Ear covers Ear mufflers Compact For winter