Panasonic KX-HNC850 Information And Troubleshooting Manual page 12

How does the camera detect changes?
The camera has 3 sensor features: a visual sensor used for motion detection, a
temperature sensor, and a sound sensor.
Note:
• The camera's sensor features are not designed to be used in situations that require
high reliability. We do not recommend use of the sensor features in these
situations.
• Panasonic takes no responsibility for any injury or damage caused by the use of
the camera's sensor features.
Using visible light to detect motion
The camera can detect motion by recognizing changes in the brightness of areas
that are visible to the camera.
Note:
• Movement may be incorrectly detected when the moving object and the
background have similar colors.
• Movement may be incorrectly detected when there are sudden changes to the
overall brightness level, such as when lights are turned on.
• Detection becomes difficult when the image is dark.
• You can adjust the sensitivity of the camera's motion detection feature, and
select which areas of the camera image are monitored for motion detection.