{"product_id":"thirdreality-presence-sensor-r2-24ghz-mmwave-radar","title":"THIRDREALITY Presence Sensor R2 24GHz mmWave Radar","description":"\u003cp\u003e\u003cstrong\u003eTHIRDREALITY Presence Sensor R2 is a battery-powered 24GHz mmWave radar motion sensor that detects human presence through non-metallic surfaces and integrates with Zigbee hubs for reliable smart-home automations.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe R2 uses 24 GHz millimeter-wave radar and on-board AI to identify human presence without cameras, providing a privacy-friendly alternative for motion detection. Because it runs on three AA batteries and connects over Zigbee 3.0, the sensor can be mounted almost anywhere and used as a trigger for lights, climate, security, and other automations on platforms like Home Assistant, SmartThings, Homey, and Echo devices with built-in Zigbee hubs.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the R2 detect presence through cabinets, glass, or thin walls?\u003c\/h3\u003e\n\u003cp\u003eThe sensor leverages 24GHz mmWave radar waves that penetrate non-metallic materials like wood and glass, measuring micro-movements and returning stable signals independent of visible light. This enables detection in concealed locations where PIR or camera solutions struggle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePenetrates wood, glass, and thin panels for hidden placement.\u003c\/li\u003e\n  \u003cli\u003eUnaffected by ambient light, temperature, or humidity changes.\u003c\/li\u003e\n  \u003cli\u003eProvides privacy because it senses motion, not images or audio.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat integrations and hubs does the sensor support?\u003c\/h3\u003e\n\u003cp\u003eThe R2 communicates over Zigbee 3.0 and pairs with a wide range of hubs and bridges so it becomes part of your existing smart-home network. It works with Home Assistant (ZHA or Zigbee2MQTT), SmartThings, Aeotec, Homey Bridge\/Pro, and Echo devices that include a Zigbee hub.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with Echo (4th Gen), Echo Plus, Echo Show 8\/10 models with Zigbee.\u003c\/li\u003e\n  \u003cli\u003eWorks with Eero 6 and Eero Pro 6 routers that include Zigbee hubs.\u003c\/li\u003e\n  \u003cli\u003eIntegrates into automations: lights, thermostats, cameras, and notifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow adjustable and reliable is detection in real homes?\u003c\/h3\u003e\n\u003cp\u003eThe sensor includes AI-enhanced environment learning and five sensitivity levels to tailor detection to different rooms and scenarios. This reduces false triggers from gentle environmental motion—like small curtain movement—while still allowing high-sensitivity monitoring when needed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFive user-selectable sensitivity settings for fine tuning.\u003c\/li\u003e\n  \u003cli\u003eAI learning filters routine environmental noise to cut false alerts.\u003c\/li\u003e\n  \u003cli\u003eNote: strong repetitive motions (fans, heavy drafts) may still activate the sensor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and power management?\u003c\/h3\u003e\n\u003cp\u003eR2 runs on three standard AA batteries, eliminating the need for wiring or an outlet and enabling discreet installation inside cabinets, on walls, or in ceilings. Battery operation plus low-power Zigbee communication delivers long service life when configured with normal activity and polling intervals.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery-powered — installs anywhere without tools or wiring.\u003c\/li\u003e\n  \u003cli\u003eLow-power Zigbee 3.0 for efficient network communication.\u003c\/li\u003e\n  \u003cli\u003eMounting options include adhesive or screws for flexible placement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The THIRDREALITY Presence Sensor R2 is ideal for smart-home users who want privacy-respecting presence detection in locations where cameras or PIR sensors aren’t practical—such as closets, bathrooms, cabinets, or behind glass. It suits hobbyists and integrators running Home Assistant, SmartThings, Homey, or Amazon Echo ecosystems who need a compact, battery-powered Zigbee trigger with adjustable sensitivity and reliable detection through non-metallic barriers.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the R2 require a Zigbee hub?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The sensor needs a Zigbee 3.0 hub (e.g., Home Assistant ZHA\/Z2M, SmartThings, Homey, or compatible Echo devices).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How long do the AA batteries last?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Battery life varies with usage and network polling, but typical low-power Zigbee operation yields months of service under normal conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"THIRDREALITY","offers":[{"title":"Default Title","offer_id":48413620207773,"sku":"B0GWM6YVQL","price":56.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/thirdreality-r2-front-view.jpg?v=1781274496","url":"https:\/\/nexoltic.com\/products\/thirdreality-presence-sensor-r2-24ghz-mmwave-radar","provider":"Nexoltic","version":"1.0","type":"link"}