I'm selling this because I'm decluttering. Operation confirmed. I bought it and wore it a few times, but I haven't worn it this year and have been storing it at home. The battery is not included, so please prepare it yourself. This is a used item, so there are stains and wear and tear from use. The sleeveless top is 60cm long and 45cm around the chest. I am 176cm tall and weigh 67kg, and I wore it as an inner layer. There is adhesive on the second code. The code was loose, and I thought the terminals might come off, so I glued it, but it didn't cause any problems during use. Thank you.