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Shelly has launched the Presence Gen4, its first mmWave radar sensor, in North America. The company says it can detect up to 10 people across 10 customizable zones and supports Matter, local control and smart-home automations; independent performance testing details were not provided in the source report.
Shelly has released the Presence Gen4, its first mmWave radar sensor, in North America, adding a Matter-compatible device designed to detect up to 10 people across 10 customizable zones. The sensor can trigger home automations based on where people are detected, while also offering local-control options for users who want to limit reliance on cloud services.
The Presence Gen4 uses mmWave radar to detect presence, including small movements that conventional motion sensors may miss when someone is sitting still. Users can define as many as 10 detection zones and set automations to respond as people enter or leave them. Shelly’s companion app displays occupancy by defined area, according to the product report.
Shelly says the device can detect up to 10 people at the same time. Adjustable minimum and maximum height settings can help users include or filter out pets, robot cleaners and other small objects. A built-in light sensor can also detect changes in room lighting. These features are intended to support automations for lighting, heating and cooling, curtains, and entertainment equipment.
The sensor connects through Wi-Fi, Bluetooth and Zigbee, and supports Matter interoperability with systems including Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant. It also supports local control and custom scripting. Shelly lists a $84.99 recommended retail price; the report says it is available through Shelly’s U.S. website and also identifies Amazon as a sales option.
Zone-Based Automation Without Cameras
The product extends smart-home presence sensing beyond a simple room-level trigger. If its zone detection works reliably in a particular layout, a homeowner could set lights or climate controls to respond to occupancy in one part of a large room rather than treating the entire space as occupied. The same approach could switch systems off when an area is empty, potentially reducing unnecessary operation.
Its camera-free sensing and local-control options may appeal to people seeking occupancy-based automation without video monitoring or a persistent cloud connection. Matter support may also make it easier to use the sensor alongside devices from different smart-home brands. Those are potential benefits, not proof of performance: the report does not provide independent accuracy tests, and results may depend on placement, room shape and configuration.
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Shelly Enters mmWave Sensing
The Presence Gen4 is Shelly’s first mmWave sensor, according to the source report. Unlike a basic motion detector that responds to movement, mmWave radar can register subtle movement and continue detecting a person who is relatively still. That distinction is relevant for automations intended to keep lights on while someone reads or works, rather than switching them off after a period without noticeable movement.
Shelly says the compact device measures 64 by 41 by 26 millimeters without its stand. Wall-mounted, it has a stated 140-degree horizontal field of view and coverage of up to 650 square feet. The report gives different figures for corner placement: a 90-degree field and up to 525 square feet. Those are manufacturer-supplied coverage specifications, not guarantees for every room. The sensor is powered by USB-C, so its location must also be within reach of a power source.
“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, chief marketing officer of Shelly USA
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Performance Depends on the Room
The source report describes the sensor’s capabilities and coverage figures but does not give results from independent testing, including how consistently it distinguishes multiple people or tracks them across zones in everyday conditions. It is also not clear how much furniture, walls, sensor placement or interference affect detection, or whether the stated coverage applies equally across different room layouts.
The report does not specify whether every feature, including multi-person zone tracking and custom scripting, works identically across all Matter platforms. Matter support is listed, but available controls can vary by the platform and integrations used. Buyers may need to check compatibility and setup requirements for their own system before relying on a particular automation.
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Retail Availability and Real-World Tests
The Presence Gen4 is available now, with a listed recommended price of $84.99, according to the source report. Wider retail availability is identified, but precise stock and delivery details are not provided. Shelly has not announced a later release date or a specific software-update schedule in the material available.
The next useful evidence will come from product testing in varied home layouts and reports on how the sensor performs with different smart-home platforms. Those results could clarify whether its zone-based, multi-person tracking is dependable enough for automations that control lighting or climate systems without frequent manual adjustments.
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Key Questions
What is the Shelly Presence Gen4?
It is Shelly’s first mmWave radar presence sensor, released in North America. It is designed to detect people and trigger smart-home automations based on occupancy.
How many people and zones can it track?
Shelly says the sensor can detect up to 10 people simultaneously and supports up to 10 customizable zones. The source report does not provide independent test results for those claims.
Does the Presence Gen4 work with Matter?
Yes. The report lists Matter support and compatibility with platforms including Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant. The exact available controls may depend on each platform.
Does it need a cloud connection?
The report says the sensor supports local control and custom scripting, offering a cloud-free option. It does not detail every setup step or feature available when operating locally.
How much does it cost?
Shelly’s listed recommended retail price is $84.99. The source report says it is available through Shelly’s U.S. website and also identifies Amazon as a sales option.
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