Cast iron and steel to a lesser degree really compromise the signal of wireless devices.

There are wireless cameras available on Amazon.

I also like to have a couple of wireless security systems in my inventory.

These days I'm paying for wireless alarm systems for my houses.

I am not a fan of the "Yellow Letter" concept personally, but get yourself a good wireless printer. if you are doing it yourself, ensure you get a high volume one but pay attention to how many prints you can make per toner cartridge.

What if you put one of those pet safe wireless instant fencing systems and a pit bull in a dog house next to the shed.

Some People put wireless alarms in.

It will be OK ... you can ask them to deliver a couple of tin-foil hats along with the meter.Most of these meters communicate over hydro lines themselves, there are a few which have wireless communications capabilities (usually with less electromagnetic output than your home WiFi access point). 

I wasn't sure where to post this, I hope it's the right forum.I've got a friend with a 20 unit trailer park set up, and I was talking to him about setting up a wifi hotspot to make a little extra money on the side.http://www.sputnik.com/support/faq/sputnick is one option.Then, as we all do, I started thinking big and thought why not just set up my own wireless ISP for the area around my properties?

What you can do depends on your particular market, but consider a few f'rinstances: Improve building security, improve outside lighting, give common areas a facelift, upgrade appliances, give away wireless internet service to all the tenants, etc.