Earphones / Headphones: Where to try, what to buy?

Ive seen two offerings, but don't really understand. Bluetooth would be good, as my phone and laptop would then connect.

http://en-uk.sennheiser.com/wireless-bluetooth-headset-headphone-smart-mobile-phone-stereo-mm-500-x

But how does this one work, it doesn't have bluetooth, so how is it wireless? Is it via the transmitter? That seems a bit naff, as I don't want a big transmitter dragged around just to use the headphones, but maybe I miss understand?
http://en-uk.sennheiser.com/wireless-headphones-home-audio-rs-170

If they have a base station, they tend to use their own radio signal which isn't bluetooth. This gives them a great bandwidth and a more stable and stronger signal over a greater range. Bluetooth wouldn't be so good if you had a large house, and they imagine the US market and want to be sure that the range is good.