The good thing about wireless (bluetooth) is that you can leave your cellphone on a desk and walk around the room while talking. The range of bluetooth seems to be about 20-30 feet, depending on the construction materials used in the walls of your house. I have a bluetooth headset that has earpieces for both ears, so if you are talking in a noisy environment, or you can't hear well, it gives some isolation from the room noise. It also has a volume adjustment on the bluetooth device.
I also have a wired device with dual earpieces that I bought at MicroCenter for less than $10, which works fine also, but does not have a volume adjustment built in, so I have to use the volume adjustment on the cell phone, which is not really a problem.