Too bad I can't return these! I use these with the Sony Bluetooth iPod Transmitter/iPod. After my similar Insignia Bluetooth headphones started falling apart within less than a year (still functional, but flimsy, lost ear pad, coming apart, etc), I got these hoping for a good replacement. They seem more solidly constructed, but the SOUND QUALITY is atrocious. It's stereo, but it's like listening to your music over the telephone. I fired up the old Insignia pair to make sure I wasn't imagining it, and it's a substantial difference in sound quality. I wouldn't recommend these for listening to music.