The clicking sound is a normal sound that only appears when the IR night lights (near the camera) turn on and off. Normally, you will only hear it at night when the IR Night Vision starts functioning. If you keep the "IR Night Vision" off, then you will not hear the clicking sound anymore.
Note:
- If you keep the "IR Night Vision" on, then the camera view will stay in black and white.
- If you keep the "IR Night Vision" off, then the camera view will be totally black at night.
