The Shelly Presence Gen4 sensor uses mmWave radar rather than a camera to track multiple people as they move through rooms or large spaces. This design choice allows the device to provide occupancy detection and automation triggers while avoiding the privacy concerns associated with video-based monitoring. The sensor can detect both people and pets.
Shelly says the device can be placed on a shelf or table using its built-in stand, or permanently mounted. Availability began today on Shelly's online store, with plans to expand to retailers such as Amazon and Best Buy. The launch follows last month's release of Shelly's $50 subscription-free security camera.
The presence sensor is aimed at homeowners and renters looking to automate lighting, heating and other smart home functions based on who is in a room, without relying on cameras or microphones.