Arlo|Smart Home Security|Wireless HD Security Cameras
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foxfly
Guide
Guide

I noticed there is one clicking sound when night vision led turns on and off. Is it normal? Thanks. 

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steve_t
Master Master
Master
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steve_t
Master Master
Master

Yep. Normal

hokeysmoke
Virtuoso
Virtuoso

The clicking sound is the IR cut filter moving out of the way so that it can see in infrared light.