... / microphone Built-in speakerphone Mono/stereo headset, hands-free and serial port profiles supported (Bluetooth® technology) Media PlayerVideo format ... .0; mono/stereo headset, handsfree, phone book access profile, and serial port profile supported o M3 (Rating for hearing aids (PDF)) Media ... Video format support: MPEG4 H.263, MPEG4 Part 2 Simple Profile, H.264, WMV o Audio format support: MP3, AAC, ...