I have a model KB334B keyboard.
It is able to pair up to 6 devices.
I can easily pair it to my Nexus 5....hit a PF key to pair...or Le Pan tablet, Sero Pro 7 tablet, or my desktop PC.
Since I am a 2 finger typist...it is very helpful to have a bigger keyboard.
Yesterday I prepared my Christmas grocery list with it.
Using Evernote, I easily prepared a checkbox item list on the Nexus 5.

I also have a Evernote folder on my Nexus 5 desktop.
It contains shortcut icons to my favorite Evernote files.
Very nice.