With four high-definition drivers, a groundbreaking low-pass filter for true subwoofer performance, and a customizable frequency response, the SE846 Earphones are engineered for a perfectly tailored listening experience. Four Hi-Def Drivers Four high-definition drivers in each ear for extended high-end clarity and a groundbreakingly low-pass filter for true subwoofer performance in a convenient and portable package. Sensitivity: 114 dB SPL/mW. Frequency Range: 15 Hz –20 kHz. Speaker Type: Quad High-Definition. Impedance: 9 Ω. Sound Isolation 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. Comes with Premium Fit Kit that includes Soft Flex Sleeves (S,M,L), Foam Sleeves (S,M,L), Yellow Foam Sleeves and Triple Flange Sleeves. Detachable cable with Remote, Mic and MMCX Connector The SE846 earphones come with a detachable and durable 3.5 mm cable with an integrated remote and microphone for easy wired connection and seamless calls and controls. These cables are designed to withstand professional level wear and tear. The Gold plated MMX connector has a lock-snap mechanism allowing 360-degree rotation for a comfortable fit.