What do you know about Bluetooth working DISTANCE?

I have a computer in my room. I have a cable going out of my PC into the living room TV. I watch internet television and other stuff on my TV from a computer.
The problem is that I have to run to my computer everytime I want to do something (pause, change channel, change video, etc)

I am looking for a device with which I could control my PC from a living room. So far I know that bluetooth offers best distance; however, I can't find good information about weather it will work at least decently when the distance is about 50 feet going through two rooms (3-4 walls). I won't be gaming in my living room, so I need just decent performance.

Does a regular bluetooth mouse with USB adapter has enough juice for this?

P.S. I've ordered a USB Bluetooth Adapter of class one. To get class one distance, does the mouse need to be class one too?

Give me any advice if you know anything, I apreciate it, thanks.

I see...
What distance should I expect if adapter is class one but the mouse is weaker, let's say class two... Will the distance theoretically be 100 meters, or whatever class two distance is?