It might seem like a kindness to provide a printer to a traveling professional, but until they invent one that works on every device, every time; that doesn't need paper at two in the morning; and has cheap toner that refills itself, we will pass on that amenity.I am sure there are other examples for all 4 quadrants, but like @Allen Duan wrote the important thing is to look at amentities through the lens of the end user (with an eye towards the "competition").

., a keyless entry or a streaming device) can also boost your ROI by enhancing guest experience.

In our largest listing, we have a triplex with a total of 11 beds and 10 baths with each bedroom set up to be potentially rented by the room (electronic lock on each bedroom door, and most with a private bathroom).

They had a device they hooked up and could listen to the sound waves. 

The funds are deposited electronically each month.  

Your GC must sign the contract electronically before a permit can be issued.

I'm thinking that I need to go to an electronic receipt tracking system, I've been doing it old school all these years - dump them on my desk, some month down the road go through them all and file them to folders for reach property, start a new folder each year. 

We've installed the Moen leak detection device, which detects leaks both hot water and cold water, and monitors water usage and gives you weekly reports.

We went with electronic signatures for a little while. 

You can also contact your mortgage holder to see how to make a principle payment if you don’t pay electronically.