Features 1、REINVENTING HEALTHY LIVING: The Smart Ring is more than just a health monitoring device, it's a proactive lifestyle. By recording and analyzing your health data, it will motivate you to adopt better lifestyle choices to stay healthy, energetic and balanced. 2、SLEEP MONITORING: Designed to help you understand the various sleep stages such as deep sleep, rapid eye movement sleep, light sleep and wakefulness, different metabolic processes occur in the body during the different stages of sleep to promote growth, repair, restoration and maintenance, a comprehensive understanding of sleep behaviors and body status. 3、MULTIFUNCTIONAL USE: Experience a diverse range of exercise activities covering both indoor and outdoor through the smart ring app. Easily track steps, distance, calories and pace while wearing the smart ring. Analyze map paths tracking and detailed workout data to improve your performance and exceed your limits. 4、ALL DAY MONITORING: The smart ring utilizes energy saving technology to ensure 5‑7 days of continuous monitoring without recharging. Made of polished stainless steel, it's easy to wear everywhere and lighter than a typical ring, non allergenic and water and sweat resistant. Comfortably and accurately monitors your health discreetly from workouts to nights out. 5、SIMPLE AND ELEGANT: The smart ring surpasses traditional wearables with its minimalist, stainless steel inner diameter design. The smart ring uses cutting edge technology for accurate data monitoring and smart manufacturing. Stylish, minimalist and generous, it performs exceptionally well in both appearance and hardware, compatible with for iOS and for Android. Specification Item Type: Smart Ring Product Material: Stainless Steel Ring Battery: 18mAh Polymer Lithium Ion Battery (built In) Ring Thickness: 2.6mm/0.1in Waterproof Grade: 50M Waterproof Bluetooth Version: BLE5.1 Working Time: 5‑7 Days APP: for CyFit (for Android or for iOS Store Download or Cell Phone Scanning Manual QR Code Download) APP Support Language: English, Chinese Simplified, Chinese Traditional, German, French, Arabic, Czech, Greek, Spanish, Japanese, Persian, Italian, Korean, Dutch, Polish, Portuguese, Russian, Thai, Turkish, Ukrainian, Danish, Hindi, Indonesian, Hebrew, Romanian, Vietnamese Package List 1 x Smart Ring 1 x USB Cable 1 x Instruction Manual