This in-ear earphone is a very good earphone for your cell phone and MP3. It is super comfortable and with soft in-ear cushions design. It will greater isolate from exterior ambient noise. The sound quality is really good with clear sound excellent high middle notes and deep bass. This in-ear earphone is a best choice for you to enjoy music via your cell phone MP3 and other music player. - Model: ES-Q3 - Impedance: 16 ohm - Frequency range: 12~20000Hz - Sensitivity: 100dB - Drive unit: 10mm - 3.5mm jack - Cable length: 130cm - Comes with an extra 2 pairs of earbuds