Featuring Dual High-Definition MicroDrivers, the SE425 uses a dedicated tweeter and woofer for an accurate and balanced sound. Detachable cable with formable wire enables easy replacement and secure, comfortable fit. Sound Isolating sleeves in multiple sizes provide up to 37 dB of isolation. Designed for the demanding audio specifications of live performance, the SE425 is engineered to provide reference quality audio. Hear all the details of your music with Dual High-Definition MicroDrivers that deliver an incredibly accurate and balanced listening experience. Comfortable sound isolating sleeves block up to 37 dB of ambient noise. Sound isolation technology prevents outside noise from interfering with your listening experience, whether onstage or on-the-go. Shure Sound Isolating Earphones require a proper fit to achieve the best sound.