Backbeat Plus - In Ear Earphones with microphone for Mobile applications. Enhanced Bass Sound Well-balanced high and mids. Extended, detailed bass response. Discreet inline microphone for calls. Convenient inline call answer end button. Custom Fit. Reduces background noise. Convenient right/left earphone identification. 6-piece fit kit with multiple silicone ear tips (S, M, L). Compatibility iPod and MP3 players with a standard 3.5 mm connector. iPhone and MP3 enabled phones also good for PCs & laptops.