Canal type earphone with superior sound insulation With comfortable earpieces in 3 size ( S/ M/ L) Available from Black, Blue, Green, Pink and White Drive Unit: Æ 10mm Frequency Response: 20Hz^ 20kHz Impedance: 16© ± 10% Sensitivity ( at 1KHz) : 101± 3dB Max Input Power: 5mW Plug: Æ 3.5mm Cord Length: 1.2m± 10%