MTX Audio In Ear Monitor Headphones5mm mid/high-frequency drivers and 8mm low-frequency drivers offer extended frequency responsebuilt-in three-button remote lets you control music and volume on an iPhone, iPod, or iPadin-line microphone lets you take calls with an iPhoneincludes assortment of different ear tips in different sizes (small, medium, large)includes drawstring pouch with carabiner clip for storage and travelfrequency response: 10-25,000 Hzsensitivity: 115 dBimpedance: 17 ohmsMIX2 in-ear headphones with in-line remote/mic and 48" cable (3.5mm plug)Cloth drawstring pouchCarabinerOwner's Manual