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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. It is designed to track up to 10 people across 10 customizable zones, supports Matter and local control, and can trigger smart-home automations based on room occupancy.
Shelly has released its first mmWave presence sensor, the Presence Gen4, in North America. The $84.99 device is designed to detect 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 to movement.
The Presence Gen4 uses radar to monitor occupancy and can detect small movements, including when a person is sitting still. Shelly says its app displays occupancy by defined area. Users can set automations to respond when someone enters or leaves a zone, such as switching lights or climate controls on and off based on which parts of a room are occupied.
The sensor supports Wi-Fi, Bluetooth and Zigbee, alongside Matter compatibility. The report lists Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant among the supported platforms. It also describes local control and custom scripting options, including an option to operate without cloud access. The source does not specify which features or integrations require particular setup steps.
Shelly lists a 140-degree horizontal field of detection when the unit is wall-mounted, covering up to 650 square feet. Corner placement narrows the field to 90 degrees and the stated coverage to 525 square feet. The compact sensor measures 64 by 41 by 26 millimeters without its stand and is powered by a USB-C cable, which must reach a power supply.
Occupancy-Based Home Automations
Presence sensing can support automations that react to continued occupancy, not just movement. Conventional motion-triggered systems may stop registering a person who remains still; Shelly says the Gen4 can detect micro-movements and maintain an occupancy reading. In practice, that could help keep lights on while someone is reading or turn equipment off after an area becomes empty.
The device’s zone-based approach may also allow different responses in separate parts of a large room. Users could, for example, configure lighting or heating around where occupancy is detected. Those outcomes depend on how the sensor is positioned and configured, and on the connected devices and platform. The report describes the intended capabilities but does not provide independent test results or comparative performance measurements.
The option for local, cloud-free control may appeal to people seeking to limit reliance on internet services or keep routine automation within their home network. The sensor reports presence rather than providing video, but the source does not detail what occupancy data is stored, how long it is retained, or how each integration handles it.
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How the Gen4 Detects Presence
Unlike a basic motion sensor that triggers when movement occurs, the Gen4 uses millimeter-wave radar to detect presence, including subtle movement. The source describes the sensor as capable of detecting people and pets and says users can set minimum and maximum height thresholds to include or filter out pets, robot cleaners and other small objects. It also has a light sensor that can detect changes in lighting.
Shelly says the sensor can be positioned on a wall or with its built-in stand, which can be flipped to adjust orientation. Placement affects its stated coverage and detection angle. The product is aimed at rooms and open-plan areas where one sensor may be configured to monitor multiple zones, though the report does not specify how reliably the device separates people who are close together.
The device’s Matter support is intended to make it work across compatible smart-home ecosystems. The report names several platforms, while noting that other Matter-compatible systems may also connect. Compatibility can depend on platform support, software versions and setup; the source does not provide a detailed matrix of supported functions for each system.
“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 and Setup Questions
The source report does not include independent testing of the claimed 10-person, 10-zone tracking, detection accuracy, or coverage figures. Real-world results may depend on room layout, mounting position, furnishings and the sensor’s settings; the report does not quantify those effects.
It is also unclear from the report how the sensor distinguishes several people in close proximity, which specific functions operate locally, or what occupancy information is retained by the device and connected services. While named platforms are listed as compatible, the source does not detail feature-by-feature support or any limitations for each one.
smart home occupancy detection device
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Availability and Buyer Checks
The Presence Gen4 is listed as available now in North America for a recommended retail price of $84.99 through Shelly’s U.S. store. The source also points to Amazon availability, but does not give a separate price, stock status or broader release schedule.
Potential buyers will need to check the current product listing for availability, supported platform features and setup requirements. More detailed independent testing could clarify how well the device tracks multiple occupants in different room layouts and how its local-control options work in practice.
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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 says it can detect up to 10 people across 10 customizable zones. The source report does not provide independent testing of that maximum.Does the Presence Gen4 support Matter?
Yes. The report says it supports Matter and lists Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant among the compatible platforms.How much does it cost, and where is it available?
The suggested retail price is $84.99. The source says it is available now in North America through Shelly’s U.S. store and points to Amazon, but does not specify Amazon pricing or stock.Can it work without cloud access?
The report describes a cloud-free local option and local control. It does not explain which features are available locally or how to configure them.Source: rss
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