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Shelly has released the Presence Gen4, its first mmWave radar sensor, in North America. The company says it can track up to 10 people across 10 customizable zones and supports Matter, local control and integrations with major smart-home platforms.
Shelly has released the Presence Gen4, its first mmWave radar sensor, in North America. The device is designed to detect up to 10 people across 10 customizable zones and use their location to trigger smart-home automations, with Matter support for connecting to compatible platforms.
The sensor uses mmWave radar to detect presence and small movements, including when a person is not visibly moving. According to the product information reported by Matter Alpha, the Shelly app can display occupancy by defined space. That gives users a way to automate actions based on where someone is, rather than relying only on a conventional motion sensor that triggers when movement occurs.
Shelly says the Gen4 can be configured to respond as people enter or leave zones. Possible uses include switching lights or climate controls on in occupied areas and adjusting them when rooms are empty. It also has minimum- and maximum-height settings intended to help users include or filter out pets, robot cleaners and other small objects. A built-in light sensor can detect changes in ambient lighting.
The unit supports Matter, Wi-Fi, Bluetooth and Zigbee, as well as local control and custom scripting. Matter compatibility is intended to allow connections with systems including Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant, subject to support and setup on each platform. The reported retail price is $84.99; Shelly’s US website is listed as a sales channel.
Occupancy Data Beyond Motion
The Gen4’s main distinction is its attempt to make room-level presence a more detailed automation input. A basic motion sensor typically reacts to movement; Shelly’s product is designed to keep detecting a person who is sitting still and to distinguish occupancy across multiple user-defined zones. If it performs reliably in a particular room, that could let households automate lighting, heating or cooling based on where people are, rather than treating an entire room as simply occupied or empty.
Matter support and local control also address two common smart-home concerns: whether devices can work across different ecosystems and whether automations can operate without routing data through a cloud service. The product material describes a cloud-free local option, but it does not establish that every integration or feature works locally. The sensor’s practical value will depend on placement, configuration, platform support and how accurately it distinguishes people from pets or other movement.
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Shelly Enters Presence Sensing
Shelly is a smart-home automation company, and the Presence Gen4 is described by Matter Alpha as its first mmWave sensor. The product is aimed at rooms where presence detection could support more specific automations than a simple motion trigger. It is a compact device measuring 64 by 41 by 26 millimeters, with a stand that increases its dimensions.
The reported coverage depends on how the sensor is installed. Wall mounting provides a stated 140-degree horizontal field and coverage of up to 650 square feet; corner mounting narrows the field to 90 degrees and is listed for up to 525 square feet. These are manufacturer-reported figures, not a guarantee of equal performance in every room. The device is powered by USB-C, so its location also depends on access to a suitable 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, CMO of Shelly USA
Real-World Accuracy Still Unclear
The available report provides product specifications and Shelly’s claims, but no independent test results establishing how consistently the sensor tracks 10 people in 10 zones under everyday conditions. It is also not clear how performance changes with room layout, furniture, sensor placement or interference, or how well height filtering separates pets and small devices from people.
The source lists compatibility with several smart-home platforms but does not detail which features are available through each one, whether setup requirements differ, or which automations remain available without an internet connection. The reported availability is in North America; broader regional release dates and pricing are not specified.
Availability and Platform Testing
The Presence Gen4 is reported to be available now in North America for a suggested retail price of $84.99 through Shelly’s US website. The report also references Amazon availability, but does not give a separate launch date or confirm availability in other markets.
For buyers, the next practical test is whether the sensor’s zone tracking and local controls work as expected with their chosen smart-home platform and room layout. Further reporting or independent reviews may clarify accuracy, platform-specific features, local operation and availability outside North America.
Key Questions
What is the Shelly Presence Gen4?
It is Shelly’s first mmWave radar presence sensor, designed to detect people in a room and support location-based smart-home automations.
How many people and zones can it track?
Shelly’s reported specifications say the sensor can detect up to 10 people across 10 customizable zones. The source does not provide independent testing of that maximum capacity.
Does the Presence Gen4 work with Matter?
Yes. The product supports Matter and is listed as compatible with systems such as Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant. Specific features may vary by platform.
Does it require cloud access?
The product information describes a cloud-free local-control option. It does not specify whether every integration and feature can be used without cloud access.
How much does it cost?
The reported recommended retail price is $84.99. It is listed as available now in North America through Shelly’s US website; availability elsewhere is not specified.
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