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Shelly has released the Presence Gen4, its first mmWave radar sensor, in North America for a suggested retail price of $84.99. The company says it can track up to 10 people across 10 customizable zones and supports Matter, local control and smart-home automations.
Shelly has released the Presence Gen4, its first mmWave radar presence sensor, in North America. The device is designed to track up to 10 people across 10 customizable zones and connect with Matter-compatible smart-home systems, allowing automations to respond to where people are rather than only whether movement has occurred.
The sensor uses millimeter-wave radar to detect presence and micro-movements, including when a person is sitting still. Shelly says users can view occupancy by defined area in its app and set actions to trigger as people enter or leave zones. The stated capacity is up to 10 people and 10 zones; these are product capabilities described in the source report, not independently tested results.
Shelly lists Wi-Fi, Bluetooth and Zigbee radios, along with Matter support for connection to platforms including Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant. The company also supports local control and custom scripting. The sensor is powered by USB-C and can be wall-mounted or positioned with its built-in stand.
The manufacturer lists a $84.99 suggested retail price and says the product is available through its U.S. website. The report also points to Amazon availability, but does not provide details on stock or regional availability there.
Zone Tracking for Home Automations
Presence sensors can make automations more specific than conventional motion-triggered routines. If a system can identify occupancy in separate parts of a room, users may be able to turn on lights, adjust climate settings or operate other connected devices according to where people are, rather than treating an entire room as occupied or empty.
The Gen4’s local-control option may appeal to people who want sensor data processed without relying on a cloud service, though the source report does not detail which features operate locally or what data is transmitted under each configuration. Its support for Matter and several radio standards could also make it easier to fit into homes that use different smart-home products. Actual compatibility and available functions may depend on the platform and setup.
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From Motion to Presence Detection
Traditional motion sensors generally trigger when movement is detected. Shelly’s product instead uses mmWave radar, which the source report describes as detecting subtle movement and maintaining presence detection when someone is not visibly moving. That distinction can matter for automations that would otherwise switch off lights when a seated person stays still.
The sensor is specified to cover a 140-degree horizontal field when wall-mounted, with coverage listed as up to 650 square feet. Corner mounting is listed at a 90-degree field and up to 525 square feet. These are manufacturer specifications; the report does not describe independent range testing or how room layout and placement affect performance.
“Accurate presence detection unlocks the kind of smart home experience customers have long dreamed about, where everything from lighting to HVAC respond automatically without needing to lift a finger.”
— Matt Brown, CMO of Shelly USA
Matter-compatible occupancy sensor
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Performance Depends on Setup
The product’s stated ability to track 10 people in 10 zones is described in the source material, but no independent test results are provided. The report also does not explain how reliably the sensor distinguishes people from pets or other moving objects in different rooms, or how accuracy changes with placement, furniture and room size.
Details about local data handling, cloud requirements for specific features, and the timing of Amazon availability are also not specified. Matter support is listed, but the source does not give a feature-by-feature account of how the sensor behaves on each supported platform.
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Availability and Compatibility Tests
The Presence Gen4 is listed as available now in North America through Shelly’s U.S. store at a suggested retail price of $84.99. Buyers will need to check retailer listings for current stock and confirm that their chosen smart-home platform supports the functions they want to use.
Further practical details will depend on user testing and platform integration, including how well zone detection works in real homes and which settings can be controlled locally. Shelly has not provided a timetable for additional regional launches in the source material.
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Key Questions
What is the Shelly Presence Gen4?
It is Shelly’s first mmWave radar presence sensor, designed to detect people and support smart-home automations based on occupancy.
How many people and zones can it track?
Shelly says the sensor can track up to 10 people across 10 customizable zones. The source report does not provide independent test results for that capacity.
Does the Presence Gen4 support Matter?
Yes. Shelly lists Matter support and names Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant among compatible platforms. Available features may vary by platform.
How much does it cost?
Shelly lists a suggested retail price of $84.99 and says the device is available through its U.S. website.
Can it work without cloud control?
The source report says the sensor offers local control and describes it as a cloud-free local option. It does not specify which individual features require an internet connection or how all data is handled.
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