As one of the world's smallest and lightest headphones, the luxurious Klipsch X11i is their finest achievement in headphones to date. Inside each museum-grade package lives a pair of superior audiophile headphones with tangle-free cords, a three-button remote for control over music and calls, and patented oval ear tips in multiples sizes to ensure maximum noise isolation and comfort. 3-button remote for full music + voice control on select Apple products Patented oval ear tips for superior comfort, passive noise cancellation and enhanced bass Directional mic for hands-free, crystal clear phone callsSpecifications Design - Full Range Balanced Armature Drive Components - Full Range KG 926 Frequency Response - 5Hz-19kHz Impedance - 50 ohms Input Connection - 3.5mm (1/8-in.) Noise Isolation - -26 Sensitivity - 110dB SPL/mW 3-Button Remote & Mic - Yes, made for iPod, iPhone & iPad Warranty - 2-Year Limited Dimension - Packaging - 7.2 H x 3.34 W x 2.36 D in. Weight - 0.35 oz.