Smoke alarm and camera red light flashing difference
The red light of the camera is the infrared camera, which is imaged when the light is not enough at night. It's kind of like an infrared imager used by the military in the movies.
The smoke alarm in normal operating conditions, most brands are smoke detectors, flashing lights, easy to understand directly the vernacular which indicates that the controller in the inspection of the detector, the detector to inspect the working state of. If the alarm status indicator is always on.
Acting on the principle is different ah.
