Brand: Sony. MPN: MDR-E9LP/BLK. The MDR-E9LP Earbuds provide quality audio in an ultra-lightweight and compact design. Ultra-lightweight and compact design ideal for life on-the-go. 13.5mm neodymium drivers provide clear natural audio with deep bass. The angled 3.5mm plug provides strain relief and is compatible with a variety of media devices. Open-air design provides crisp realistic audio with deep bass.