This is a used item purchased on Mercari in January 2022. The previous owner purchased it in December 2021. I used it about once or twice a month for an hour each time during the winter, so I don't think I've used it for a total of 50 hours. I checked the battery consumption, and after 2 hours and 46 minutes of continuous LDAC playback from 100%, the remaining battery was 95%, so I don't think there's been much deterioration. The headband, etc., had a cover on them, so there's no deterioration. Also, the ear pads are the genuine mesh material ones for the ATH-M50xSTS. The original genuine ones are also included. - Brand: audio-technica - Model: ATH-M50xBT2 - Connectivity: Bluetooth - Color: Black - Ear Pads: Soft Pads I cannot accept price negotiations. Any "price reduction requests" will be rejected. Also, direct negotiations via messages are not allowed and will be deleted without a reply, so please be aware of this. This is a product that has been in someone's hands, so please refrain from purchasing if you are a perfectionist and are overly concerned about minor details.