NFC SMART ACCESS CONTROL - Replace the door card, elevator card parking card and community access card. Real-time health monitoring, Know information at all times - Real-time monitoring of heart rate, bloodoxygen, and blood pressure. Care for family - Understand the health information of family members, Add family members as friends and you can view their health information. IP68 Waterproof - IP68 level waterproof effect. It's waterproof in and suitable for swimming. A variety of sports modes. Record information such as exercise heart rate, speed, and time in real time. Remote control for taking photos - Record wonderful moments. Use the APP to enter the remote control for taking photos function and shake the ring to remotely control the phone to take photos. Model:No.8 Colour:Black Material:Ceramic + glue filling Package Contents: 1 * Smart Ring 1 * Charging box 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.