iM-490S iMetal® Isolation Earphones For Sansa®, iPod® and MP3 Featuring lightweight alloy metal housing and high-fidelity 9mm neodymium drivers, the Made for Sansa iM-490S is acoustically tuned to provide optimal audio playback from your Sansa MP3 or video player. Also works with iPod and any MP3 players. MSRP:$49.99. Where to Buy    •  Reviews Other Views Features Specifications •  Lightweight aluminum alloy body •  High-fidelity 9mm neodymium drivers •  3 pairs/sizes (L,M,S) of eartips •  Gold-plated 3.5mm stereo plug •  2-ft extension cable •  Premium carrying case •  Lifetime warranty •  Frequency response: 18Hz-22KHz •  Sensitivity (1KHz, 0.1V): > 100dB •  Maximum SPL output: >120dB