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Shelly announced the Presence Gen4, a camera-free smart-home sensor that uses mmWave radar to detect the presence and movement of up to 10 people. The sensor is available from Shelly for $84.99 and supports several smart-home platforms and connectivity standards.
Shelly has launched the Presence Gen4, a smart-home sensor that uses mmWave radar rather than a camera to detect the presence, movement and activity of people and pets. The device can detect up to 10 people at once and is available through Shelly’s online store for $84.99, according to The Verge.
The Presence Gen4 is designed to monitor indoor spaces and trigger connected devices when people enter or leave. Shelly says users can set up to 10 independently customizable detection zones, allowing an automation to respond to activity in a particular area rather than across the entire room. For example, a light could be set to turn on when someone occupies a desk area, or a home theater could respond when someone sits on a sofa.
The sensor has a 140-degree horizontal field of view and is rated to cover spaces of up to 650 square feet. It can sit on a shelf or table using its built-in stand, or be mounted on a wall. It requires a power source for its USB-C cable, so it is not a battery-powered placement option, according to the report.
Shelly says the Presence Gen4 works with Google Home, Apple Home, Amazon Alexa, Samsung SmartThings and Home Assistant. Its listed connectivity options include Wi-Fi, Bluetooth, Zigbee and Matter. The Verge reported that the product was expected to reach retailers including Amazon and Best Buy, but the report did not give dates for those listings.
Room-Level Automation Without Video
The product offers homeowners another way to make room-based automations respond to occupancy without installing a camera. Because the Presence Gen4 uses mmWave radar, it can detect people and movement without recording video, a distinction that may matter to people who want occupancy-based lighting, climate or entertainment controls but prefer not to use cameras indoors.
Its multiple detection zones could also make automations more selective. Rather than switching on a device whenever anyone is somewhere in a monitored room, a user can configure a particular zone to trigger it. The report says the sensor can also be adjusted to ignore objects close to the floor, which may help prevent pets or a robot vacuum from activating certain automations. That performance will depend on configuration and the space; the source does not provide independent test results.
The $84.99 price and support for several major smart-home systems make the device relevant to people already using connected home equipment. Its need for a nearby power outlet, however, may limit where it can be installed.
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Shelly’s Expanding Smart-Home Line
The Presence Gen4 announcement followed Shelly’s launch of a $50 subscription-free security camera the previous month, according to The Verge. The new sensor serves a different purpose: it is intended to identify occupancy and movement for automations, rather than record video as a camera does.
Presence sensors are used in smart homes to automate devices based on whether people are in an area. Shelly’s model adds the ability to configure separate detection zones and says it can track as many as 10 people simultaneously. The report describes its integrations and connectivity standards, but does not detail setup steps, subscription terms beyond the camera comparison, or how the sensor handles data.
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Performance and Retail Dates Unconfirmed
The available report does not provide independent testing of the 10-person detection claim, the stated coverage area, or the sensor’s accuracy in different room layouts. It is also unclear how reliably it distinguishes people from pets or other moving objects under varied conditions; Shelly’s reported options for adjusting sensitivity do not establish performance in every home.
The report does not specify when the Presence Gen4 will appear at Amazon or Best Buy, or provide further details about data processing, storage or privacy controls. Radar detection avoids camera footage, but the available source does not explain what information the sensor collects or how it is handled.
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Retail Availability and Testing
The Presence Gen4 is available for $84.99 through Shelly’s online store, according to The Verge. The company’s stated plan, as reported, is to bring it to other retailers such as Amazon and Best Buy, though no arrival dates were given.
For prospective buyers, the next practical details to watch are retailer availability and independent assessments of detection accuracy, range and setup across different room layouts. Buyers will also need to check that their chosen smart-home system and preferred automation are supported, and plan for a location with access to USB-C power.
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Key Questions
What does the Shelly Presence Gen4 do?
It uses mmWave radar to detect the presence and movement of people and pets, then can trigger smart-home automations such as lighting, heating, cooling or music controls.
Can it detect multiple people at once?
Shelly’s reported product description says the sensor can detect up to 10 people simultaneously. The source does not include independent testing of that claim.
Does the Presence Gen4 use a camera?
No camera is described. The sensor uses mmWave radar rather than video to detect presence, movement and activity. The available report does not detail its data handling practices.
How much does it cost, and where can I buy it?
The reported price is $84.99 through Shelly’s online store. Availability at Amazon and Best Buy was expected, but no dates were provided.
Which smart-home systems does it support?
The reported integrations include Google Home, Apple Home, Amazon Alexa, Samsung SmartThings and Home Assistant. Listed connectivity options include Wi-Fi, Bluetooth, Zigbee and Matter.
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