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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; independent performance testing is not included in the source report.
Shelly has released the Presence Gen4, its first mmWave radar presence sensor, in North America, offering smart-home users a device the company says can detect up to 10 people across 10 customizable zones. The sensor supports Matter and local control, allowing occupancy-based automations such as switching lights or climate systems on and off without relying on a camera.
The Presence Gen4 uses mmWave radar to detect presence, including small movements when a person is still. According to the product information reported by Matter Alpha, users can define as many as 10 zones and view occupancy for each in the Shelly app. The device is intended to trigger actions as people enter or leave those areas, rather than only responding to movement through a room.
Shelly lists a 140-degree horizontal field of view and coverage of up to 650 square feet when the sensor is wall-mounted. Corner mounting narrows the field to 90 degrees, with listed coverage of up to 525 square feet. The unit measures 64 by 41 by 26 millimeters; its built-in stand changes its dimensions and can help with positioning. It is powered through USB-C, so placement also depends on access to a power supply.
The device includes Wi-Fi, Bluetooth and Zigbee radios, alongside Matter support. The source report says it can connect with Matter-compatible platforms including Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant. Shelly also offers local control and custom scripting. The sensor has a suggested retail price of $84.99 and is listed as available through Shelly’s U.S. website; the report also mentions Amazon availability.
Zone-Based Automation Without Cameras
The product’s main appeal is room-level occupancy information: automations can respond to where people are, not just whether a sensor detected movement somewhere nearby. A household could use that information to control lights, heating or cooling, shades and other connected devices in particular areas. Detecting small movements may also help keep an automation active when someone is sitting quietly.
Matter compatibility may make the sensor relevant to buyers using different smart-home platforms, while local control offers an option for people who prefer devices to operate without depending on a cloud service. The source describes the app’s zone display as an alternative to video monitoring, but radar occupancy sensing is not the same as identifying a person or providing a visual record. The practical value will depend on setup, room layout and detection performance.
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Shelly Enters mmWave Sensing
The Presence Gen4 is Shelly’s first mmWave sensor, according to the source report. It is designed to go beyond conventional motion-triggered automation: mmWave radar can detect subtle movement, allowing a sensor to register a person who remains in place rather than waiting for them to cross its field of view.
The device also offers adjustable height detection, which users can configure to include or filter out pets, robot cleaners and other small objects. A built-in light sensor can detect changes in lighting. These features give users additional ways to tune automations, although the source does not provide independent tests comparing detection accuracy or false-trigger rates with other sensors.
“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
Performance Claims Need Testing
The published information says the sensor can detect up to 10 people in 10 zones, but the source report does not include independent testing, accuracy figures or conditions for reaching those limits. It is not clear how reliably the device distinguishes people from pets or moving objects in different room layouts, or how often it may produce missed detections or false triggers.
The report also does not specify how long local control can operate without internet access, which Matter features are available at launch, or whether all listed platform integrations support the same functions. Amazon availability is mentioned, but the source does not provide a detailed listing or confirm its timing. Those points may vary by software, platform and retailer.
Availability and Real-World Reviews
The Presence Gen4 is listed as available now in North America, with a suggested retail price of $84.99 and sales through Shelly’s U.S. website. Buyers considering it for an existing Matter setup will need to check compatibility and available features with their specific smart-home platform.
Further product documentation, platform support details and independent testing could clarify how the sensor performs across different homes. Until those results are available, the advertised people count, zone capacity and coverage figures should be treated as product specifications rather than independently verified outcomes.
Key Questions
What is the Shelly Presence Gen4?
It is Shelly’s first mmWave radar presence sensor, designed to detect occupancy and trigger smart-home automations.
How many people and zones can it track?
Shelly’s product information says it can detect up to 10 people across up to 10 customizable zones. The source report does not include independent testing of those limits.
Does the sensor support Matter?
Yes. The source report says the Presence Gen4 supports Matter, as well as Wi-Fi, Bluetooth and Zigbee radios. Platform features may differ, so users should check support for their specific setup.
How much does the Shelly Presence Gen4 cost?
The reported suggested retail price is $84.99. The source says it is available through Shelly’s U.S. website and also mentions Amazon.
Does it need a cloud connection?
The source report says the sensor supports a cloud-free local option and local control. It does not specify which functions remain available without internet access, so buyers should consult Shelly’s documentation for details.
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