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Shelly has released the Presence Gen4, its first mmWave radar presence sensor, in North America for $84.99. The company says it can track up to 10 people across 10 customizable zones and supports Matter, local control and automations that do not depend on cloud services.
Shelly has released its first mmWave radar presence sensor, the Presence Gen4, in North America, offering detection for up to 10 people across 10 customizable zones. The $84.99 device supports Matter and local control, giving smart-home users another way to trigger lighting, climate and other automations based on where people are in a room.
The Presence Gen4 uses mmWave radar to detect presence, including subtle movement that conventional motion sensors may miss when a person is sitting still. In the Shelly app, users can define zones and view occupancy by area. The sensor is intended to trigger actions as people enter or leave those spaces, rather than simply responding to movement somewhere in the room.
Shelly lists a 140-degree horizontal field of view and coverage of up to 650 square feet for wall-mounted placement. Corner placement is listed at a 90-degree field and coverage of up to 525 square feet. The compact sensor measures 64 by 41 by 26 millimeters without its stand; its USB-C power cable needs to reach a suitable power source.
The device includes Wi-Fi, Bluetooth and Zigbee radios, alongside Matter support. The source report says it can work with platforms including Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant. Shelly also supports local control and custom scripting. The sensor has a built-in light sensor, and its height settings can be adjusted to include or filter out smaller objects such as pets and robot cleaners.
Zone Detection Changes Room Automations
The main difference from a basic motion-triggered setup is the ability to make automations depend on occupancy in a particular zone. A user could, for example, have lights respond to a person entering one part of an open room, or adjust heating and cooling when an area is occupied. The sensor can also help turn off equipment when a monitored space is empty, although the real-world energy savings will depend on how it is configured and used.
For privacy-conscious households, Shelly’s stated local-control option offers an alternative to systems that rely on cloud processing. The device is not a camera, and the report describes the app as showing occupancy by defined space. That may appeal to people who want presence-based automations without video monitoring, though the practical privacy and network details depend on the user’s configuration.
Matter support may also make the sensor easier to connect to a broader smart-home setup. However, compatibility does not mean every feature will work identically in every platform: users should check which zone, detection and scripting controls are available in the system they use.
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From Motion Sensing to Presence
Traditional motion sensors typically trigger when they detect movement, which can make them less useful when someone remains still for a long period. Presence sensors using mmWave radar are designed to register smaller movements and maintain occupancy detection even when a person is not moving around. The Shelly product is the company’s first sensor in this category, according to the source report.
The Presence Gen4 is positioned for rooms where location matters, including larger or open-plan spaces. Its 10-zone configuration lets users divide a monitored area into separate regions, while the reported maximum of 10 simultaneous people is intended to support occupancy-aware automations beyond a simple occupied-or-empty trigger. These are product specifications; independent performance testing was not included in the source material.
“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
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Performance and Platform Details
The reported coverage, field of view and ability to track 10 people are manufacturer specifications reported by Matter Alpha. The source material does not include independent testing, accuracy rates, false-trigger data or results from different room layouts. It is also unclear how reliably the sensor distinguishes people from pets or other moving objects in everyday conditions.
Although local control is listed, the report does not specify which functions operate without an internet connection, how data is stored, or whether every Matter platform exposes all 10 zones and detection settings. The source says the product is available now through Shelly’s U.S. site and refers to Amazon availability, but does not give a clear launch date or confirm stock and shipping details for every retailer.
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Availability and User Testing
The Presence Gen4 is listed at a recommended retail price of $84.99 and is available through Shelly’s U.S. website, according to the report. Prospective buyers will need to check current retailer listings for stock and delivery information. As the product reaches more homes, user testing and platform updates should clarify how its zone controls perform in different room configurations and which features are accessible through each smart-home ecosystem.
For now, the confirmed development is Shelly’s North American launch and the feature set described by the company and the source report. Independent reviews or further compatibility documentation would help establish how closely everyday results match the stated detection and coverage specifications.
zone-based motion detection sensor
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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’s reported specifications say it can detect up to 10 people across 10 customizable zones. Independent performance testing was not provided in the source report.
Does the Presence Gen4 support Matter?
Yes. The report lists Matter support, as well as Wi-Fi, Bluetooth and Zigbee. Available features may vary between connected platforms.
Can it work without cloud services?
Shelly supports a local-control option, according to the report. The source does not specify which individual features continue to work without an internet connection.
How much does it cost?
The reported recommended retail price is $84.99. It is listed as available in North America through Shelly’s U.S. website; buyers should check retailers for current stock.
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