Simple ring with health management features. - Brand: b.ring - Design: Simple and modern ring - Features: Equipped with health management functions - Copyright: © 2024 Apposter Inc. Product Name: B.ring Smart Ring Model Name: BRMB Bluetooth 5.1 OS: Android 6.0 or later, iOS 13 or later Manufacturing Date: February 2025 Purchased from a recycling shop, never used, so operating time is unknown. Power-on confirmed. Please understand that this is a used item. Ships the same day.