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Shelly announced the Presence Gen4, a camera-free mmWave radar sensor that can detect up to 10 people at once and monitor as many as 10 customizable zones. It is available from Shelly for $84.99, with wider retail availability expected; its real-world accuracy and performance are not established in the source report.
Smart-home maker Shelly has announced and released the Presence Gen4, a sensor that uses mmWave radar to detect up to 10 people at once without a camera. Priced at $84.99 through Shelly’s online store, the device is designed to trigger home automations based on where people are in a room, while avoiding video recording.
The Presence Gen4 detects presence, movement and activity using millimeter-wave radar, according to the product details reported by The Verge. It can sit on a shelf or table with its built-in stand, or be mounted on a wall. Shelly lists a 140-degree horizontal field of view and coverage of spaces up to 650 square feet.
The sensor supports up to 10 independently configurable detection zones. Those zones can be used to set different responses to activity in parts of a room: a light might switch on when someone occupies a desk area, for example, while home-theater equipment could respond to presence near a sofa. The report says users can also choose whether to include pets in detection and adjust sensitivity to reduce responses to low-to-the-ground objects such as robot vacuums.
The device needs a power source for its USB-C cable. The reported connectivity and smart-home options include Wi-Fi, Bluetooth, Zigbee and Matter, with integrations listed for Google Home, Apple Home, Amazon Alexa, Samsung SmartThings and Home Assistant. The Verge reported that Shelly expected the sensor to reach retailers including Amazon and Best Buy, but gave no firm dates for those listings.
Radar-Based Room Automations
The sensor’s combination of multi-person detection and configurable zones could make presence-based automations more specific than a simple room-wide motion trigger. A system could respond to occupancy in one part of a space while ignoring activity elsewhere, which may help prevent lights, heating, cooling or music from activating when nobody is using the relevant area. Shelly presents these as possible automation uses; the report does not provide independent testing of how reliably they work.
Its camera-free approach also offers an alternative for households that want occupancy sensing without capturing video. That does not establish that the device collects no data or that its operation raises no privacy questions: the source report does not detail what information the sensor stores, processes or transmits. Buyers will need to consult Shelly’s product and privacy documentation for those specifics.
Compatibility across several smart-home platforms and protocols may make the device relevant to people with different home setups. However, a list of supported systems alone does not confirm that every feature works identically across each platform, or that setup is equally straightforward in all configurations.
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Shelly’s Latest Smart-Home Device
The Presence Gen4 follows Shelly’s launch of a $50 subscription-free security camera the previous month, according to The Verge. The two products serve different purposes: the camera records images, while Shelly describes the new sensor as using radar to detect people and activity without a camera.
Presence sensors are used to automate actions according to whether people are in a space, rather than relying only on a brief movement event. In the Gen4’s case, Shelly’s reported features include separate detection zones, pet-related settings and sensitivity adjustment. The source material describes the advertised functions and specifications, but does not include a review, hands-on test or comparison with competing sensors.
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Performance and Privacy Details
The source report does not establish how accurately the Presence Gen4 distinguishes people from pets or other moving objects, how well it tracks multiple people in practice, or whether walls, furniture and room layouts affect detection. The 10-person capacity, field of view and coverage area are reported product specifications, not independent test results in the material provided.
It is also unclear what data the sensor retains or sends to Shelly or connected services, and whether all listed integrations support the same controls. The report gives no firm date for availability through Amazon, Best Buy or other retailers. It does not specify whether the $84.99 price includes taxes or shipping.
multi-person detection radar sensor
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Retail Rollout and User Testing
The next reported step is broader retail availability: Shelly expected the Presence Gen4 to appear at Amazon and Best Buy, though no schedule was provided. Buyers can currently check Shelly’s online store for the product and its current price and availability.
Further details from Shelly, retailer listings or independent testing could clarify how the sensor performs in different room layouts, how its person and pet settings behave, and what information is handled by the device and its integrations. Until those details are available, the reported capabilities should be treated as product specifications rather than verified performance findings.
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Key Questions
What is the Shelly Presence Gen4?
It is a smart-home presence sensor that uses mmWave radar to detect people, movement and activity without a camera, according to the product report.
How many people can it detect at once?
Shelly’s reported specification is up to 10 people simultaneously. The source material does not include independent testing of that capacity.
How much does the Presence Gen4 cost?
The reported launch price is $84.99 through Shelly’s online store. The report did not provide a price for other retailers.
Does the sensor record video?
The Presence Gen4 uses radar instead of a camera, so it is described as a camera-free sensor. The report does not explain what other data it may store or transmit; check Shelly’s product and privacy documentation for those details.
Which smart-home systems does it support?
The report lists Google Home, Apple Home, Amazon Alexa, Samsung SmartThings and Home Assistant, along with Wi-Fi, Bluetooth, Zigbee and Matter. Feature availability across each system was not detailed.
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