SHELLY Presence Gen4 Motion Sensor

The SHELLY Presence Gen4 is an advanced motion sensor that utilizes mmWave radar to detect the actual presence of people, even when they are completely still. This innovative device can track up to 6 individuals simultaneously, supports up to 10 configurable detection zones, and monitors an area of up to 42 m², ensuring exceptionally precise home automation. Its multi-protocol connectivity, including Wi-Fi 6, Zigbee 3.0, Bluetooth 5 LE, and Matter certification, allows for seamless integration with modern smart home systems. The compact design, measuring 64 × 41 × 26 mm without the base, ensures discreet installation in almost any room. Unlike traditional motion sensors that often fail to detect users sitting still (e.g., at a desk, reading, or watching TV), the Shelly Presence Gen4 uses 60–64 GHz radar to identify even motionless individuals. This ensures that lighting, air conditioning, and other automated systems remain active as long as someone is genuinely present, enhancing comfort and preventing unnecessary device shutdowns. This smart sensor facilitates advanced automation scenarios by simultaneously identifying and tracking up to 6 people. With support for up to 10 independent detection zones, you can assign different actions to specific areas of a room. For instance, in large living rooms or offices, lighting can be activated only where users are present, optimizing convenience and reducing energy consumption. The device also displays detected individuals on a room map for real-time monitoring and easier configuration of zones. The Shelly Presence Gen4 offers adjustable detection sensitivity and transmission power to tailor its operation to specific room conditions. It includes floor-level motion filtering and the ability to ignore small objects like pets or cleaning robots, minimizing false triggers and ensuring accurate human presence detection. Additionally, a built-in light sensor monitors ambient light levels (dark, dim, bright), enabling automations that respond to both presence and current lighting conditions for more natural scenes, such as activating soft lighting at dusk. Integration with smart home systems is effortless due to support for Wi-Fi 6, Bluetooth 5 LE, Zigbee 3.0, and Matter over Wi-Fi. It's compatible with platforms like Shelly Cloud and Home Assistant, and supports voice assistants such as Amazon Alexa, Google Smart Home, and Samsung SmartThings. A built-in web interface allows direct configuration via a web browser without extra apps. When integrated with Matter-compatible systems, each additional detection zone appears as a separate component, enabling complex automations. Its compact housing (64 × 41 × 26 mm without base; 73 × 41 × 37 mm with base) blends discreetly into any interior. The sensor can be placed on a shelf, table, or cabinet using its freestanding base, or mounted on a wall with adhesive tape or screws. It also supports 180° inverted mounting for optimal adaptation to room layout. Recommended mounting height is 2 m, with a maximum room height of 5 m. This sensor is suitable for homes, apartments, hotels, offices, commercial facilities, and public institutions. It promotes energy savings by automatically turning off lights and devices when rooms are vacant and enhances privacy by using mmWave radar instead of cameras. **General Specifications:** * **Manufacturer:** Shelly * **Model:** Presence Gen4 W **Physical Specifications:** * **Dimensions (H × W × D):** 64 × 41 × 26 mm (without base); 73 × 41 × 37 mm (with base) * **Weight:** 42 g (without base); 85 g (with base) * **Mounting Method:** Freestanding base (shelves, tables, cabinets), Adhesive tape (flat surfaces), Screws and wall anchors (walls) * **Housing material:** Plastic with an aluminum back * **Housing color:** White **Operating Conditions:** * **Operating temperature:** -20°C to 40°C * **Operating humidity:** 30 to 70% RH * **Maximum operating altitude:** 2000 m **Electrical Specifications:** * **Power supply:** 5 V DC via USB-C, 1 A * **Power consumption:** 2.5 W (nominal); 3.5 W (maximum) **Sensors:** * Light sensor * Radar sensor **Wi-Fi:** * **Protocol:** 802.11 b/g/n/ax * **Radio band:** 2401–2483 MHz