New, unopened product Immediate purchase welcome! Purchase without comment welcome! Bulk purchase welcome! Please take a look at my profile. b.ring Smart Ring, Bring, Health Management, Sleep Management, Up to 7 Days of Battery Life, Android & iPhone Compatible, Dedicated App, Ultra-Lightweight, IP68 Waterproof, Pedometer, Japanese Instruction Manual/Magnetic Charging Cable Included/Black, US Size 9 (Japanese Size 18-20/Inner Circumference 59.5mm) 【Color】Black 【Size】9 (Japanese Size 18-20/Inner Circumference 59.5mm) 【Supports Daily Health】 b.ring (Bring) is a smart ring that analyzes biometric information just by wearing it, supporting your health. It features a comfortable fit perfect for daily life and a stylish design. 【6 Functions for Health Management】 ① Sleep data recording ② Heart rate monitoring ③ Blood oxygen check ④ Stress management ⑤ Exercise recording ⑥ Step count recording 【Check Anytime with the Dedicated App】 Easily check the measured data in the dedicated app for health management. Compatible with both iPhone and Android. From June 2025, it will also be possible to link with Apple Health and Google Fit. 【If You Think There's a Problem】 If you have trouble "connecting with the app" or "measurements aren't being taken," please update the firmware to the latest version from the dedicated app. 【For Your Peace of Mind】 Data processing is performed on servers in Japan. In addition, it has obtained the Ministry of Internal Affairs and Communications' technical standards conformity certification (003-240204) and adopts IP68, which is dustproof and waterproof, allowing use in the shower.