Ear Bud HeadphoneHA-F10CEar bud headphone with hard carrying caseThe HA-F10C is the stereo ear bud headphone 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 Maximum Input Capability: 300mW (IEC) Nominal Impedance:32 ohms Cord Length: 3.94 ft Weight: 0.18 oz Stereo Speaker Headphones HA-F10C Driver Unit 0.53" (13.5mm) Frequency Response 20-20,000Hz Nominal Impedance 32ohms Sensitivity 98dB/1mW Max. Input Capability 300mW(IEC) Cord Length 3.94ft (1.2m) Weight (without cord) 0.18oz (5g) Plug Nickel Plated