Rich, full bodied sound enhanced by ProBass™ Technology. Interchangeable ear plugs in 3 sizes for comfortable fit. Lightweight for listeners on the move. In-The-Ear Secure Fit for Optimal Performance. Noise isolation is maximized while comfort & fit are uncompromised. Deeply enhanced bass specifically engineered for digital players. Providing greater sound output and a more accurate music reproduction. Custom-designed carrying case with jet set enabled travel adaptor. Perfect for all MP3 and music players.