They are battery operated and work with your wifi system.

Joe Kim You don't lose anything on wholesale, only time and battery, if you so choose to marketing materials, that too.

After completing all of his modules and gaining all the knowledge he had to offer I quickly made the decision to get very serious about Real Estate Investing. 

When you add on that "module" and any others that you might need, the cost of Rentec is basically equal to Buildium

There are two power systems, battery operated or hard wired, which allow the meter to communicate with a wireless router that sends the data to a database at the company (this is accessable to you the owner/property manager via the web) and then a bill is sent to the tenants automatically at a interval that you set.

Taxes/ year: $3,002,  Insurance: $1,573,  Trash/ year: $654,   Electric/ year (exterior lights): $420,   Water/ year: $1,200 sewer/ year: $1,500,   Spray for bugs/ prevention: $311/ year,    Lawn cutting/ year: $640,   Misc (furnace filters/ 9v batteries): $250I have gotten mixed reviews back from my colleagues when they go over these numbers with me.

I ordered the 6Amp batteries on eBay.

It works great batteries last about 10 months or so. 

I would still offer key so incase the batteries go dead or the lock gets stuck. 

It works great, but I need to change the 4 AA batteries every ~3 months.