(cellular)I don't have a promo code. 

She mentioned that she found a camera that would allow you to insert a sim card in it and it would work with motion sensors and only uploaded images when motion was detected through the cellular data plan of the sim card.

You just have place your own customers is all.Because you can reach the sign using cellular data, you can update the sign from anywhere at any time.

You would pay a low fee per month per gateway because it's using cellular.

With the celllular, it's about $400 for the hardware, and $35/month for the cellular signal, notification, etc.

The downside - it's expensive.I suppose you could use cellular-based trail cameras that ping your phone and shoot video when triggered.

@Danny Farrell I had a contractor install a Simplisafe system and I really liked it.It uses cellular so no landline or internet needed.

@Emily AllenI use SimpliSafe which is a self-installed (non-permanent), wireless (uses cellular technology) alarm system.

You can buy a customizable system that is completely wireless and have it monitored through a cellular signal that is built in for just $15/ month with no contract!

Some of the more experienced guys here use cellular alarm systems.