There are no defects or scratches regarding the use. I am selling this because I bought a new hearing aid prescribed by an otolaryngologist, and I thought someone who needs it could use it. I used it occasionally for about three months from 2024. (Vibe) nano8 (for left ear) hearing aid, disinfected at a specialist store. * Use by installing the dedicated app (for volume and sound quality adjustment) on your smartphone and pairing it with the hearing aid. * Please download the Vibe app in advance and create a personal account before use. ・Air battery usage time: nano8: approximately 8 hours (Unused, there are 9 packs of additional air batteries, 6 batteries per pack) ・Replacement sleeves are available in all sizes, so they should fit anyone's size. (S, M, L sizes (1 each), XS size 4) * For more details, please search for "Vibe". * Please note that no claims or returns are accepted after purchase for used items. * I am also selling on other flea market apps, so please understand that there is a possibility of early termination.