The sony mdre9 in ear headphones combine a comfortable fit and crystal clear audio in a trendy minimalist finish their ergonomic design ensure an easy stable fit whether at rest or on the go the headphonesrsquos 135 mm driver unit reproduces powerful bass to give your favourite music a high quality sound and the durable and lightweight 12m cord ensures you have the freedom to move without being weighed down neodymium magnet 135mm driver unit reproduces powerful bass sound pair with a music p