Shelly has begun selling the Presence Gen4 radar sensor in North America, positioning the device for integrators and installers who need room-level occupancy detection without cameras. The sensor uses millimeter-wave (mmWave) radar to detect people — including occupants who remain seated or otherwise still — and exposes a real-time occupancy map while avoiding image capture.
Technical capabilities and connectivity
Presence Gen4 supports up to 10 customizable detection zones, enabling automations that trigger based on a person’s location inside a space. The unit also reports ambient light conditions via a built-in light sensor and offers adjustable sensitivity and filtering intended to ignore low-level movement from pets, robot vacuums and similar sources.
- Sensing: mmWave radar with room-level occupancy mapping and up to 10 zones
- Connectivity: Wi-Fi 6, Bluetooth 5 LE, Zigbee 3.0 and Matter over Wi-Fi
- Integration: Shelly Cloud, Home Assistant and other smart home platforms; local control supported
- Power and form factor: USB-C powered; designed for shelf, tabletop or wall mounting
Integration options and channel details
Shelly says Presence Gen4 can integrate with Shelly Cloud and Home Assistant, and supports local control without mandatory cloud connectivity. The company positions the product for automations across lighting, motorized shades, climate and entertainment systems. The sensor launched in North America in October with a U.S. price of $84.99.
| manufacturer | model | key interfaces | price | availability |
|---|---|---|---|---|
| Shelly | Presence Gen4 | mmWave radar; Wi-Fi 6; Bluetooth 5 LE; Zigbee 3.0; Matter over Wi-Fi | $84.99 | Launched in North America, October |
The sensor’s advertised ability to detect non-motion occupancy — people who are sitting still — differentiates mmWave approaches from passive infrared (PIR) motion detectors, which require movement to trigger. Shelly also emphasizes the device’s configurable detection settings to reduce false triggers and its ambient light readout for lighting automations.
Designed for flexible placement, Presence Gen4 can be placed on a shelf or mounted to a wall and uses a USB-C power connection. Shelly’s product notes that local control is possible without cloud services, while wider ecosystem connectivity is available through the company’s cloud and common smart home platforms.
Pricing and the North American launch timing are taken from Shelly’s announcement. Installers and integrators considering room-based presence solutions for privacy-sensitive projects or multi-sensor automation can evaluate the Presence Gen4 alongside other camera-free radar and ultrasonic occupancy products for fit and platform compatibility.
