Features: Elevates your wellness journey with the intelligent rings that seamlessly blends health tracking and style, featuring advanced for fitness, sleep, and heart rate monitoring. This intelligent rings boasts waterproof rating, for everyday wear while keeps track of your vital health statistics through the app. For health individuals and fitness enthusiasts who value convenience and technology, the intelligent rings is designing to cater to both men and women seek a fashionable way to stay connection to their health goal. Whether you're at the offices, hitting the gym, or enjoyings outdoor activities, this intelligent rings fits perfectly into any scenario, providing you with real time health insight right on your finger. With its innovative wireless enableds app remotes controls shooting feature, capture life's moment effortlessly without ever reaching for your phone, making the intelligent rings a must having gadget for technology trendsetters. Specifications: Inner Diameter:Approx.18.1mm/18.9mm/19.8mm/20.6mm/21.4mm/22.2mm Color:Black/Silver Package Includes: 1pcs Intelligent Rings note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. ②.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.