... price and high quality 3.OEM/ODM is welcome best earphones The parameter:Frequency response: 20Hz to 20kHz Speaker size: 10mm ... when use it.*High-quality cord provides high signal, low noise transmission*10mm drivers produce excellent sound quality from any sound ... *Ideal for use with portable audio devices with 3.5mm earphones jack, such as MP3, CD, DVD players and portable game ...