One of the most important features of a smart video doorbell is accurate motion detection. When a device relies on only one type of sensor, it may sometimes send unnecessary notifications caused by environmental changes or random movement near the entrance.
Combining Radar + PIR helps make detection more accurate.
How Does It Work?
PIR detects changes in heat caused by a person or another warm object.
Radar detects movement and tracks how an object moves through the surrounding space.
When both technologies work together, the device can better determine whether real movement is happening near the door and whether a notification should be sent.
Why Is It Better?
Dual detection helps the system detect movement more accurately and reduce unnecessary alerts. Some smart video doorbells also include facial recognition, which can help distinguish between familiar and unfamiliar visitors and make notifications more informative.
- more accurate motion detection;
- fewer unnecessary notifications;
- better identification of real visitors;
- more efficient everyday use.
Overall, Radar + PIR combined with additional smart detection features means more accurate monitoring, fewer false alerts, and a more convenient user experience.
R810 — See How It Works in Real Life
Watch the video to see how the R810 Smart Video Doorbell handles smart detection and entrance monitoring in everyday use.

