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Shelly announced the Presence Gen4, a camera-free smart home sensor that uses mmWave radar to track up to 10 people at once. It is available from Shelly for $84.99 and supports several smart home platforms and connection standards.
Shelly has launched the Presence Gen4, a camera-free sensor that uses mmWave radar to detect people, motion and activity, with support for tracking up to 10 people at once. The device costs $84.99 through Shelly’s online store and is designed to trigger smart home automations without recording camera footage.
The sensor can sit on a shelf or table using its built-in stand, or be mounted on a wall. Shelly says its 140-degree horizontal field of view lets it monitor spaces of up to 650 square feet. It needs a nearby power source for its USB-C cable, so placement depends in part on access to an outlet or other compatible power supply.
Users can configure up to 10 independent detection zones. Those zones can link presence in a particular part of a room to an action, such as turning on a desk lamp when someone sits at a desk. The report says the sensor can also detect pets, while sensitivity settings can reduce responses to low objects such as a robot vacuum.
Shelly lists compatibility with Google Home, Apple Home, Amazon Alexa, Samsung SmartThings and Home Assistant. The device supports Wi-Fi, Bluetooth, Zigbee and Matter, according to the report. Shelly says automations can control lighting, heating, cooling or music when someone enters a space and switch those devices off after the person leaves.
Radar Presence for Smart Home Routines
The Presence Gen4 offers a way to trigger room-based automations without installing a camera in the space. For people who want lights or other devices to respond to occupancy while avoiding camera footage, radar-based detection provides a different approach. The report describes the sensor as detecting presence, motion and activity, but does not provide independent testing of its accuracy or privacy characteristics.
Support for several major smart home platforms and connection standards could make the device useful in homes with mixed equipment. Its multiple detection zones also let users set different responses for separate areas of a room. Those features may help make automations more specific, although the practical results will depend on setup, placement and how the sensor performs in each space.
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Shelly’s Latest Smart Home Device
The launch follows Shelly’s introduction of a $50 subscription-free security camera the previous month, according to The Verge. The Presence Gen4 serves a different purpose: it detects occupants and activity for smart home routines rather than recording camera images.
Shelly’s device is intended for both smaller rooms and larger spaces within its stated 650-square-foot coverage. Wall mounting is an option for using its wide field of view, while the built-in stand allows placement on a shelf or table. In either setup, the USB-C power requirement means the sensor is not described as a battery-powered device.
Performance Details Still Unreported
The report does not provide independent measurements of how reliably the Presence Gen4 distinguishes multiple people, detects pets or identifies activity. It also does not explain how performance may vary with room layout, obstacles or sensor placement. Shelly’s stated coverage and multi-person capacity are product claims in the source material, not independently verified results.
The device is available through Shelly’s online store, while sales through retailers including Amazon and Best Buy are described as expected. The report does not give a date for that broader availability. It also does not spell out what data the sensor stores or transmits, or provide further detail on its privacy and security practices.
Retail Availability and Setup
Shelly’s Presence Gen4 is available for $84.99 from its online store, according to The Verge. The company is expected to bring it to other retailers, including Amazon and Best Buy, but a schedule was not specified in the report.
Readers considering the device can compare its supported smart home platforms with their existing setup and check whether a suitable USB-C power source is available where they want to place it. Further information about real-world detection performance, privacy practices and retailer launch dates may emerge as the product reaches more users and stores.
Key Questions
How much does the Shelly Presence Gen4 cost?
The reported price is $84.99 through Shelly’s online store.
Does the Presence Gen4 use a camera?
No camera is described. The sensor uses mmWave radar to detect presence, motion and activity.
How many people can it detect at once?
Shelly’s reported claim is that the Presence Gen4 can detect up to 10 people simultaneously. The source does not include independent performance testing.
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.
When will it be sold by other retailers?
Availability through Amazon and Best Buy is expected, but the report does not give a date.
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