It's mono Bluetooth. It's stereo Bluetooth. It's both.
Jabra's BT8010 Bluetooth earphone can be expanded to stereo and connects to two devices.
Sometimes you chat. Sometimes you listen to music. Sometimes you alternate between the two on your music phone. And sometimes you alternate between the two using two different devices. Oh, why can't there be one Bluetooth earphone to handle all these situations?
Well, there is--the Jabra BT8010, to be released in the next couple months. First, it's a regular, single, over-the-ear Bluetooth earpiece with an OLED display that shows caller ID. You can also transfer up to 30 contacts to the headset in case you don't want to reach for your cell phone to make a call. Jack in the second earpiece and now you have a Bluetooth 2.0 stereo headset with AVRCP--Audio/Video Remote Control Profile--that lets you pause, skip, and reverse from the headphone (assuming the music device is equipped with the AVRCP profile).
But even better, the BT8010 ($149) earphones can connect to two Bluetooth devices simultaneously, such as a phone and a music player equipped with
The one drawback to this dual earpiece arrangement--one more small gadget to charge and then lose.