NFC Functionality: This smart health ring incorporates premium technology for precise data monitoring and smart manufacturing. With built in NFC, it can be used as an NFC card, automatic link sender, and quick WIFI and Bluetooth connection. Not only is it intelligent, but it also boasts a simple and elegant design, making it incredibly fashionable. Comprehensive Sleep Analysis: By analyzing sleep efficiency, latency, time, , movements, and temperature, this ring provides a comprehensive understanding of sleep behavior and body condition. The sleep tracking feature makes it an perfect health . Boost Your Fitness: Experience a diverse range of indoor and outdoor activities through the smart ring application. Simply wear the ring to effortlessly track steps, distance, calories, and pace. Analyze map and detailed exercise data to enhance your performance and push beyond your limits. Smartphone Camera Remote Control: The ring doubles as a release, allowing you to take selfies or group photos without needing assistance. Even when you're alone, you can record perfect with ease. It can also be used for video scrolling, electric book page flipping, and music control. All Day Monitoring: This smart ring utilizes energy saving technology to continuous monitoring for 3 to 5 days without the need for charging. Made with polished aluminum alloy for durability and medical-grade 316L stainless steel for comfort, it is also waterproof with an IP68 rating to . Due to different batches, the appearance, color and printed words of the product , which will not affect the use. Colour:Cyan Material:Metal Size:Diameter:19.8mm Package Contents: 1 * Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.