Ultimate Ears™ 400vi Noise-Isolating Headset-model looks & rockin sound. No need to fumble with your iPhone, Black Berry or iPod.* On-cord controls let you take calls, adjust the volume & change tracks on the run. Designed by Ultimate Ears-the choice of the worlds top touring musicians-your stylish headset delivers a detailed & immersive sound stage, crisp calls & noise isolation. A sleek micro design lets your headset sit flush with your ears, small & unobtrusive. With five pairs of soft silicone ear cushions from XXS to L, you wont have to worry about getting the right fit-even if youve got small ears. Noise-isolating Comply™ Foam Tips help seal out noise & let you focus on your music. & the no-tangle flat cord saves you time & eliminates hassles. * Volume control functionality not available with Black Berry devices. Audio is supported by all music-enabled smartphones with 3.5 mm jack. Your headset delivers detailed, immersive sound, crisp calls & noise isolation-and it works with your iPhone, Black Berry, iPod or MP3 player (with a 3.5 mm jack). On-cord controls let you answer calls, change tracks & adjust volume without taking your iPhone, Black Berry or iPod out of your pocket.* * Volume control functionality not available with Black Berry devices. Audio is supported by all music-enabled smartphones with 3.5 mm jack. Designed by Ultimate Ears means you hear the professional sound preferred by the worlds top touring musicians. Superior acoustics deliver a detailed & immersive sound stage-with crisp highs, warm mids & powerful bass-that puts you front row, center for your music. A stylish micro design lets your headset sit flush with your ears, small & unobtrusive.