... 3. Fit for protable players, CD player 4.various colors in ear headphones Model No.: BYZ-X56Parameter:Speaker size: φ 30mmFrequency range ... :3.5mm Maxinum power :5 mw Microphone: 3.0 * 1.5mm -62±3dBDescription1. On-ear design for noise cancelling, and provideing ... in mobile phone handsfree headset, MP3/MP4 headphones, universal USB charger etc., We own 2 brands "BYZ" and "Tonzhiyin" in ear ...