... PC, DVD, VCD, MP3, MP4 and CD player2. FM radio: The headset can be used as FM radio separately, search and lock ... Operation distance > 30 meters(360 degree)5. Signal-to-Noise Radio> 50db6. Distortion < 2% THD7. Speaker : 40mm mylar8. ... handset, protector case, Memory card, USB cable, speaker, MP3, Unlock and so on.If you are interested in ... bluetooth headphones with Mic for laptop/computer/MP3/MP4