B&W C5 noise-isolating in-ear headphones bring you amazingly natural acoustics and fit so comfortably and securely you"ll hardly be aware you"re wearing them. B&W unique Micro Porous Filter system makes sure that sound is open, spacious and full of rich, lifelike detail. So you can truly lose yourself in unadulterated sound, even when you"re on the move. The C5 In-Ear Headphone features B&W innovative Secure Loop design - loops of plastic-coated wire that curl around the inner rim of your ears and hold the in-ear headphones firmly in place. The C5s are also Tungsten Balanced, meaning that the headphones are weighted towards your ears, rather than away from them, for optimized noise isolation. C5"s MFI remote and microphone make the headphones the perfect match for your iPod or iPhone. They also come with a quilted carrying pouch. Features Description - Intra aural (ear canal) headphone with noise isolation Drive units - 2x 9mm Impedance - 32 ohms Frequency range - 10Hz to 20kHz Distortion (THD) - <1% Sensitivity - 118dB/V at 1kHz Inputs - 3.5mm stereo mini jack (on cable) Cable length - 1.2m / 3.9 ft. Weight - 20g / 0.71 oz.