The Image S4i adds a mic, in-line volume, and iPod controls to the already excellent Image S4.
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This extra feature adds $20 to the price of the earphones--iPhone users will get the most value out of it.
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One side of the pill module features a pinhole mic while the other side incorporates a variety of buttons. Clicking the call answer button once plays/pauses music, twice skips forward a track, and three times skips back.
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The control module rests about midway down--connecting the Y-junction--in a position like many necklaces.
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The package includes Klipsch's signature contoured eartips, which offer an exceptionally secure and comfortable fit.