I used it for about two weeks, using it for 1 hour a day. Although I am not a professional, I have disinfected the main unit with alcohol. Operation has been confirmed. There are no noticeable scratches, but please understand that this is a used item, so no claims or returns are accepted. It seems to be discontinued on Amazon. SOUNDPEATS Breezy Open Ear Wireless Earphones, New Release 2024 [VGP2024 SUMMER Gold Award] [VGP2024 SUMMER Planning Award] Wireless Earphones, Ear Hook Type / Up to 40 Hours of Playback / Multipoint Connection / Bluetooth 5.4, Open Ear Headphones (Black)