I'm using BT Motorola S305, wired Koss in-ears (KE29 & The Plug) and the original in-ears.
- wireless for office use.
- wired for better quality and noise isolation. KE29 are earbuds, and the Plug are earplugs.

DashX0: the S305 can connect to 2 devices at once. I noticed better audio quality on single connection to the phone during audio playback. The range is pretty good I would say ~20feet away while my phone is stored in a metal cabinet in my office.