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Shelly has announced the Presence Gen4, a camera-free smart-home sensor that the company says can detect up to 10 people at once using mmWave radar. Available from Shelly for $84.99, it supports multiple smart-home platforms and offers configurable detection zones. Its real-world accuracy and the timing of wider retail availability have not been established in the supplied report.
Shelly has announced the Presence Gen4, a smart-home sensor that uses mmWave radar rather than a camera to detect people moving through a room. The company says it can track up to 10 people at once; it is available through Shelly’s online store for $84.99, with other retail availability expected later.
The Presence Gen4 detects presence, motion and activity, according to the report, and is intended to let users trigger smart-home actions when people enter or leave an area. Examples include switching on lights, heating, cooling or music when a person arrives, then turning those devices off after the space is empty. The sensor does not record camera footage because it has no camera.
Shelly says the device can monitor spaces of up to 650 square feet and has a 140-degree horizontal field of view. It can sit on a shelf or table using its built-in stand, or be mounted on a wall. In either setup, it needs power through a USB-C cable, so placement depends on access to a power source.
The sensor offers as many as 10 independently configurable detection zones. That allows users to set different automations for particular areas, such as turning on a desk lamp only when someone sits at a desk. Shelly also says users can include pets in detection or adjust sensitivity to ignore low objects, which could help prevent a robot vacuum from triggering an automation.
According to the report, the Presence Gen4 supports Wi-Fi, Bluetooth, Zigbee and Matter and can integrate with Google Home, Apple Home, Amazon Alexa, Samsung SmartThings and Home Assistant. Shelly lists the price at $84.99 through its online store. The report says Amazon and Best Buy are among retailers expected to carry it, but does not give a date for those listings.
Radar Presence Without Video
The Presence Gen4 targets a practical gap in smart-home automation: motion sensors can miss someone who is sitting still, while camera-based devices capture images or video. Shelly’s radar approach is designed to detect presence without recording a visual feed, which may appeal to people who want room-level automations but prefer not to install a camera indoors. That distinction does not by itself establish how the sensor processes or stores other data.
Support for several smart-home platforms and connectivity standards could make the sensor useful in homes with different brands of devices. Its configurable zones also offer more precise control than a single room-wide trigger. Still, the listed coverage and multi-person capacity are product claims; the supplied report does not include independent testing of detection reliability, setup, or performance through walls and furniture.
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Shelly’s Smart-Home Lineup
The announcement follows Shelly’s launch of a $50 subscription-free security camera the previous month, according to The Verge report. The Presence Gen4 takes a different approach to sensing: rather than providing a camera view, it uses mmWave radar to detect people, pets and movement for automation purposes.
The product’s stated integration options include both major consumer smart-home platforms and Home Assistant, as well as the Matter standard. That breadth could reduce the need to use a single ecosystem, though compatibility does not necessarily mean every feature works identically across each platform. The report does not specify which functions are available through each integration.
“The Presence Gen4 can detect up to 10 people simultaneously without a camera.”
— Shelly, as described in The Verge report
Performance and Retail Timing
The supplied report does not establish how accurately the Presence Gen4 distinguishes people from pets or other moving objects, or how well it tracks several people at once in a furnished, occupied room. It also provides no independent test results for the stated 650-square-foot coverage or the performance of individual detection zones. The sensor’s use of radar rather than a camera confirms that it does not record video, but the report does not explain what sensor data is collected, processed or retained.
Shelly’s store is listed as selling the device for $84.99, while its arrival at Amazon and Best Buy is described as expected. No dates for those listings are given. The report also does not detail whether all advertised integrations and features are available at launch or require setup through particular apps or hubs.
Retail Listings and Product Tests
The next near-term development is the sensor’s expected arrival at Amazon and Best Buy; the supplied report gives no confirmed schedule for either retailer. Buyers can currently check Shelly’s online store for the stated $84.99 price and availability.
Further product reviews and hands-on testing will be needed to assess how reliably the sensor handles multiple people, pets and separate zones in everyday homes. Those tests could also clarify whether performance differs across supported smart-home platforms and how much configuration is needed to prevent unwanted automation triggers.
Key Questions
What does the Shelly Presence Gen4 do?
It uses mmWave radar to detect presence, motion and activity, then can trigger compatible smart-home automations such as lights or climate controls.
Does the sensor have a camera?
No. The reported design uses radar rather than a camera, so it does not record camera footage. The supplied report does not describe other data handling or retention.
How many people can it detect, and how much space can it cover?
Shelly says it can detect up to 10 people at once and monitor an area of up to 650 square feet. These are stated product specifications, not independently verified results in the supplied report.
How much does the Presence Gen4 cost, and where is it available?
The reported price is $84.99 through Shelly’s online store. Amazon and Best Buy are expected to carry it, but no dates for their listings were provided.
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 support. It does not specify whether every feature is available in every integration.
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