They can be standalone, but you'd want to have something that communicates through the internet to your mobile device. 

I’m interested in the same solution to open the door for prospective tenants without being there and without depending on an agent.Do you know any company that does these bluetooth devices? 

If you live in a registration state, most sporting goods stores that sell guns will be able to help you out.

Your kids won't be going to school just during school time...nope, you have sports, band, theater and on and on and on.

For example in my area Sheetrock is $25 per sheet hung and taped, roofing is $300 a square installed, electricians figure one hour per device, framing is $1 per square ft.

In that case a locksmith would help. if it is any other device made to secure the door, then use a drill or elecrtric saw to cut it.

Claims his job is to chase away the sports reporters from the buffet table in the locker room, and says it with a straight face.Man, you are really in such a good place. 

I'm going to make a weightlifting reference here, but I think it applies.If you look at countries who dominate the sport of Olympic weightlifting today, you'll see a handful of Asian and European countries.

I have seen the jumping of the wires many times.. those folks have to be nuts that do that so easy to fry yourself and very easy for the house to burn down.. its insane what happens in those areas and those houses.. its almost like sport to the locals. 

I heard from one of my buddies who used to work for Analog Devices that there are new systems that use cell towers instead of wifi so work even if there is a power outage - that would've come in handy for me when the power went out for our whole block and no one realized it until the next morning.