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Most security camera systems are wireless these days, you wouldn’t even have to do that. Security camera systems have gotten so cheap and common most people have them on the front door and/or garage door in the form of a ring camera. You would literally be investing less than $100 to add a security camera in the walk-in, if that’s the breaking point holding your boss back from giving you a raise you need to be looking for a new job.

Walk-in coolers/freezers are giant Faraday cages. You can’t get wireless in or out, so it’d need to be wired.

I don’t know what your talking about there, they’re not lined with lead. My cell phone still got service whenever I went into a walk in at every restaurant I worked at when I was in college.

Bestaa is correct in that they greatly diminish the propagation of radio waves. They are not perfect faraday cages but a lot of the better insulated walk ins are very difficult to get radio waves into them. Cell service, walkie talkies, WiFi, GPS.

I’ve never walked into a walk in where my service wasn’t significantly impacted.

Not sure what you’re on about.

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