{"product_id":"oura-ring-4-ceramic-smart-ring-size-before-you-buy-with-or4-sizing-kit-size-13-cloud-2025-grade-b","title":"Oura Ring 4 Ceramic Smart Ring Size Before You Buy with OR4 Sizing Kit Size 13 Cloud (2025)","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"top-header\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cheader class=\"main-header\"\u003e\n\u003ch1\u003eOura Ring 4 Ceramic Smart Ring - Size 13 Cloud\u003c\/h1\u003e\n\u003c\/header\u003e\n\u003csection class=\"product-description\"\u003e\n\u003ch3\u003eOVERVIEW\u003c\/h3\u003e\n\u003cp\u003eThe Oura Ring 4 Ceramic Smart Ring (Size 13, Cloud) is an advanced wearable activity tracker engineered to deliver comprehensive biometric telemetry and health logging in a sleek, screenless format. Encased in a structurally resilient Cloud ceramic housing, this device is optimized for corporate professionals and health-conscious individuals who require seamless, non-intrusive monitoring. Driven by low-power embedded sensing architecture, it captures precise heart rate, sleep metrics, and daily activity levels with exceptional multi-day battery efficiency. This refurbished Grade B hardware configuration offers elite structural longevity and outstanding fiscal value for modern digital wellness lifestyles.\u003c\/p\u003e\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Biometric Sensing\u003c\/strong\u003e: Continuously tracks heart rate, blood oxygen, body temperature variations, and detailed sleep stages with high sensor accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Ceramic Housing\u003c\/strong\u003e: Built with a highly durable, scratch-resistant Cloud ceramic finish engineered for lightweight, all-day comfort.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Efficient Battery Performance\u003c\/strong\u003e: Delivers multi-day continuous telemetry tracking on a single charge with low-power sensor architecture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless Mobile Integration\u003c\/strong\u003e: Wireless Bluetooth pairing syncs health metrics instantaneously with companion mobile applications for comprehensive data analysis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 15px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eDevice Type\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eSmart Ring \/ Activity Tracker\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eOS Version\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eProprietary Embedded Firmware (iOS\/Android Compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eProcessor \/ CPU\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eLow-Power Embedded Microcontroller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eRAM Size + Type\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eIntegrated Embedded Memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eStorage\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eInternal Flash Memory (Multi-day offline telemetry cache)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eScreen \/ Display\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eNone (Screenless Ergonomic Design)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eTouch Screen\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eColor\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eCloud (Ceramic)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eBattery\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eIntegrated Rechargeable Battery (Up to 7 Days Battery Lifecycle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eHardware Upgradeability Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eNon-Upgradeability - Factory-sealed waterproof ceramic housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eMemory Upgradeability\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eNon-Upgradeability - Fixed embedded chipset architecture\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f5f5f5;\"\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003eStorage Upgradeability\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eNon-Upgradeability - Fixed internal memory modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; font-weight: bold; padding: 8px; border: 1px solid #e0e0e0;\"\u003ePhysical Ports \u0026amp; Expansion\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #e0e0e0; color: #333;\"\u003eNone (Utilizes inductive magnetic charging dock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCONNECTIVITY\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Low Energy (BLE)\u003c\/strong\u003e: Low-power wireless protocol for continuous data synchronization with compatible iOS and Android devices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWHAT'S INCLUDED\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOura Ring 4 Ceramic Smart Ring (Size 13, Cloud)\u003c\/li\u003e\n\u003cli\u003eCharging Dock with USB Charging Cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDOES NOT INCLUDE\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOriginal Box\u003c\/li\u003e\n\u003cli\u003eSizing Kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONDITION\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"color: #333;\"\u003eThis Grade B refurbished product has been thoroughly inspected, tested, and restored to full operational condition by trained technicians. Minor cosmetic imperfections or light signs of previous use (such as slight surface marks) may be present. This device is fully functional with 100% hardware integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  *{margin:0;padding:0;box-sizing:border-box;}\n  body{font-family:'Open Sans',sans-serif;background:#fff;color:#333;line-height:1.6;}\n  .container{max-width:1200px;margin:0 auto;padding:20px;}\n  .top-header{background:#000;color:#fff;padding:10px 20px;text-align:center;}\n  header.main-header{background:#4caf50;padding:20px;text-align:center;}\n  header.main-header h1{color:#fff;font-size:2.5em;margin:0;}\n  .product-description{background:#fff;border:1px solid #e0e0e0;padding:30px;margin-top:20px;box-shadow:0 2px 4px rgba(0,0,0,0.1);}\n  .product-description h3{color:#4caf50;margin-bottom:12px;margin-top:25px;font-size:1.35em;}\n  .product-description table{width:100%;border-collapse:collapse;}\n  .product-description ul{margin-left: 20px; margin-bottom: 20px;}\n  footer{background:#f1f1f1;text-align:center;padding:20px;margin-top:30px;color:#777;font-size:0.9em;}\n\u003c\/style\u003e","brand":"R3NEW","offers":[{"title":"Excellent","offer_id":67620982358249,"sku":"JZ90-57460-13^A","price":389.99,"currency_code":"USD","in_stock":false},{"title":"Good","offer_id":67620982391017,"sku":"JZ90-57460-13^B","price":369.99,"currency_code":"USD","in_stock":true},{"title":"Eco-Save","offer_id":67620982423785,"sku":"JZ90-57460-13^C","price":329.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/5433\/3161\/files\/259286.jpg?v=1791213254","url":"https:\/\/r3new.com\/products\/oura-ring-4-ceramic-smart-ring-size-before-you-buy-with-or4-sizing-kit-size-13-cloud-2025-grade-b","provider":"R3NEW","version":"1.0","type":"link"}