The Sennheiser MX 55 Street earphones are designed for a snug fit. The innovative Twist to fit system is designed with a more secure fit in mind. The additional piece at the top of the earbud rests just inside your ear and secures the earbud in place. Personalize these earbuds with any of the three adapters that are included, small, medium and large. The MX 55 has slightly better technical specifications than the MX 50 or MX 51, as both have a 19 to 21,000 HZ frequency response. The MX 55 VC has the same technicial specifications as the MX 55 Street. The major difference is the volume adjusted located in the cord of the MX 55 VC. Created for use with your MP3, CD/DVD/MD player and portable gaming system, they have a 2 year warranty. These earphone also come with exchangeable design parts and a carrying case.
