b.ring smart ring. Titanium model in matte black. Size 9. Compatible with Android and iPhone. [Brand] b.ring [Category] Smart Ring [Condition] No noticeable scratches or stains [Color] Matte Black [Size] 9 [Compatible OS] Android, iPhone Purchased in October 2025 for 11,000 yen and used for 2 months. It is waterproof, but I removed it when bathing or doing dishes. There is a tiny scratch under the b. ring mark, but it's not very noticeable. Please refer to the images. No pets, and no smokers in the family. Please understand that this is a used item before purchasing.