Sennheiser HD 449 Headphones Black Advanced acoustic system with powerful neodymium magnets and lightweight diaphragms for a lifelike stereo sound experience The closed circumaural headphone design isolates against ambient noise, and an additional ergonomic design provides a comfortable fit Gold-plated plugs and 6.3mm stereo adaptor for excellent connectivity with home hi-fi equipment Carrying pouch and extension cable for protection and added length Optimised for portable audio including MP3, CD players, iPad, iPod and iPhone Connectivity technology : Wired