Sleek Audio SA6 In-Ear Earphones (Discontinued by Manufacturer) Wide Band Balanced Armature Driver with Custom Porting The Unique VQ System Enables Personalization of Your Listening Experience by Acoustically Altering the Frequency Response Replaceable / Interchangeable Swivel Cables Scratch-Resistant Polycarbonate Case 60 Inch Cable, 50 ohm Impedance, Lightweight