{"product_id":"oura-ring-4-ceramic-smart-ring-size-before-you-buy-with-or4-sizing-kit-size-10-midnight","title":"Oura - Ring 4 Ceramic - Smart Ring - Size Before You Buy with OR4 Sizing Kit - Size 10 - Midnight","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 10 - Midnight\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 (Size 10, Midnight) is an elite biometric activity tracker engineered to seamlessly deliver continuous health telemetry and performance monitoring in a sleek, lightweight smart ring format. Crafted with a high-performance zirconia ceramic exterior and an allergen-free titanium inner shell, this device provides non-intrusive 24\/7 monitoring for professionals and wellness-focused individuals. Driven by Oura's proprietary Smart Sensing technology and advanced optical sensor arrays, it delivers precise metrics on sleep architecture, heart rate variability, daily stress, and physical readiness. Offering an extended multi-day battery lifecycle and broad iOS\/Android compatibility, this Grade A refurbished wearable delivers top-tier health management and exceptional fiscal value.\u003c\/p\u003e\n\u003ch3\u003eKEY FEATURES\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Performance Zirconia Ceramic Build\u003c\/strong\u003e: Featuring a sleek Midnight ceramic exterior bonded to a biocompatible titanium interior, this smart ring ensures ultra-lightweight durability and non-intrusive 24\/7 wearability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced Smart Sensing Platform\u003c\/strong\u003e: Equipped with multi-channel green, red, and infrared LEDs alongside a digital temperature sensor, the ring dynamically optimizes signal paths for accurate heart rate, SpO2, and sleep tracking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Day Battery \u0026amp; Wireless Recharging\u003c\/strong\u003e: Experience up to 8 days of continuous telemetry on a single charge with rapid inductive magnetic dock recharging in 20 to 80 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless Ecosystem \u0026amp; App Integration\u003c\/strong\u003e: Connect effortlessly via low-energy Bluetooth to sync complete health metrics, readiness scores, and automatic activity detection with iOS and Android wellness platforms.\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 \u0026amp; Biometric Wearable\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 \u0026amp; 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;\"\u003eUltra-Low-Power Microcontroller with Smart Sensing Platform\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;\"\u003eSystem-Integrated Microcontroller SRAM\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;\"\u003eOnboard Fixed Flash Memory (Local Data Caching)\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;\"\u003eScreenless 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;\"\u003eMidnight (Zirconia Ceramic Exterior \/ Titanium Interior)\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 Lithium-Polymer (Up to 5–8 Days Battery Life)\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-Upgradable – Factory-sealed 100m (10 ATM) water-resistant casing\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-Upgradable – System-on-chip integrated 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-Upgradable – Fixed onboard flash storage\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 magnetic inductive wireless dock interface)\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 connection for localized data synchronization with iOS and Android devices via the Oura App.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiometric Sensor Array\u003c\/strong\u003e: Integrated PPG green and infrared LEDs, red blood oxygen sensors, digital body temperature sensor, and 3D accelerometer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMF-Safe Wireless Management\u003c\/strong\u003e: Fully FCC-certified low-EMF operation with supported Airplane Mode configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWHAT'S INCLUDED\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOura Ring 4 Ceramic (Size 10 - Midnight) Device\u003c\/li\u003e\n\u003cli\u003eSize-Specific Magnetic Inductive Charging Dock\u003c\/li\u003e\n\u003cli\u003eUSB-C Charging Cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDOES NOT INCLUDE\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAC Wall Power Charging Adapter\u003c\/li\u003e\n\u003cli\u003eOriginal Retail Box\u003c\/li\u003e\n\u003cli\u003eRing Sizing Kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONDITION\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"color: #333;\"\u003eThis item has been professionally tested by trained technicians and is fully functional. The device has been professionally restored to a very good condition with minimal signs of wear. This is a refurbished product. It has been inspected, tested, and restored to full working condition. Minor cosmetic imperfections may be present. Devices will have some variation in appearance.\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":"Oura","offers":[{"title":"Excellent","offer_id":67621166743785,"sku":"JZ90-57455-10^A","price":389.99,"currency_code":"USD","in_stock":true},{"title":"Good","offer_id":67621166776553,"sku":"JZ90-57455-10^B","price":369.99,"currency_code":"USD","in_stock":false},{"title":"Eco-Save","offer_id":67621166809321,"sku":"JZ90-57455-10^C","price":349.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/5433\/3161\/files\/259304.jpg?v=1791216322","url":"https:\/\/r3new.com\/products\/oura-ring-4-ceramic-smart-ring-size-before-you-buy-with-or4-sizing-kit-size-10-midnight","provider":"R3NEW","version":"1.0","type":"link"}