Keep your levels on an even keel with the 50/50, securing a custom fit to provide you with deep bass resonance and full spectrum of sound. Ballistic bass, composite buds with microphone, volume, and track control.Features: In-line microphone pulse control switch and volume control (1 click for play/pause ; 1 click to answer or end calls ; 2 clicks for next track ; 3 clicks for previous track ), 11mm Power Drivers, Nylon Mesh Carry Case, 2 Silicone Gel Sizes Specs: Magnet Type: NdFeB, Frequency Response: 20-20k Hz, Impedance: 16 ohms, Max Input Power: 100mW, Cable Type: TPE/Nylon, Cable Length: 1.3M, Plug Type: 3.5mm Gold Plated In-line microphone function compatible with: iPhone, iPod models (including shuffle) Most Blackberry (with stereo jack)