iTech has released a Bluetooth stereo headset that combines mono and stereo sound for listening to audio as well as hands-free calling. If you have a phone-enabled PDA, this could be very useful but make sure that it uses the Bluetooth 1.2 specification.
It offers up to 6 hours of talk time or stereo playback and up to 150 hours of standby time, all in a package that weighs 27 grams.