【Check the Size Before Purchase】Before buying the Prxxhri Smart Ring, please refer to the size chart and carefully measure your finger’s circumference. This ensures a comfortable fit and avoids unnecessary returns or exchanges. 【Health Monitoring】The prxxhri ring features advanced 4.0 sensors that automatically measure your heart rate, blood oxygen, and blood pressure every 30 min when worn. It provides continuous health tracking and comprehensive wellness management all day. 【Real-time and Accurate Sleep & Fitness Monitoring】prxxhri Smart Ring enables real-time tracking of sleep quality and daily activities. Equipped with advanced sensors, it delivers precise data on sleep cycles, aiding in optimizing rest and recovery.Whether monitoring steps, calories burned or athletic performance, it serves as an excellent fitness tracker. Offering accurate insights, it supports fitness goals and enhances overall health—also a great gift for family and friends. 【80-meter Waterproof, Suitable for Various Scenarios】 The prxxhri Smart Ring has excellent waterproof performance, with a waterproof depth of up to 80 meters. Whether it's for daily wear, an intense workout session or a pleasant swimming time, it can handle it with ease. What's more, even if you have sensitive skin, you can still enjoy an extremely comfortable wearing experience when wearing this ring. 【3-5 Day Battery Life】 With a 3-5 day battery life, the prxxhri smart ring ensures continuous health monitoring without frequent charging. When used with the smart charging case, the usage time can even exceed 20 days. Whether you are tracking sleep patterns or fitness activities, you can count on long-lasting performance without constant interruptions. 【No APP Subscription Required】 Say goodbye to hidden fees! The prxxhri smart ring does not require any APP subscription, giving you full access to all its features without ongoing payments. Smart Ring Health Tracker， Sleep/Exercise Monitoring, iOS/Android, IP68 Waterproof, No Subscription, 5-Day Battery for Women & Men