Gadget advice from friends

Eric: I am looking for a really-small USB headset.Friends: Have you tried Bluetooth headsets!? They're small!! Eric: Yes, I've tried Bluetooth. It doesn't work in urban environments. Friends: I like Bluetooth. They are really small. Eric: I hate Bluetooth. I had to retire my mouse because there is so much 2.4Ghz noise in urban environments. Friends: Have you tried Bluetooth?

I'm going to stop asking for input.

But special thanks to Roget, who has gone out of his way to be helpful. :) And also, Victor A., who suggested the Plantronics .Audio 400 foldable headset. This is the headset I use already. I'm looking for one I can use on the road (much smaller). I don't think it exists.