Combining stunning ergonomic design with equally remarkable acoustic performance, the Shure SE310 sound isolating earphone delivers extended range audio complete with enhanced bass. Sound isolating earphones were originally developed as Personal Monitor Systems to allow musicians to hear their own performances in loud onstage environments. They work by using soft, flexible sleeves to block background noise, allowing small, high-performance drivers to deliver incredibly precise sound directly to the ear. By selecting from an assortment of included soft sleeves, you are able to personalize the fit of the earphones to your ears. The detachable modular cable is perfect for customising the length between your earphones and MP3 player.