... 3. Fit for protable players, CD player 4.various colors in ear headphones Model No.: BYZ-X56Parameter:Speaker size: φ 30mmFrequency range ... manufacturer in China, we have 3 factories, more than 1000 employees, with the product capacity of 4 million sets earphone ... monthly. We are specializing in mobile phone handsfree headset, MP3/MP4 headphones, ...