JVC HAF10C/HDPHN/EARBUD/CASE/ The HA-F10C is the stereoearbudheadphone with convenient hard carrying case. It produces high quality sound with 13.5mm driver unit. * Powerful sound for MP3 player * Frequency Response: 20-20,000Hz * Sensitivity:98 dB/1mW * 13.5 mm driver unit * MaximumInput Capability: 300mW (IEC) * Nominal Impedance:32 ohms * Cord Length: 3.94 ft * Weight: 0.18 oz