Featuring Dynamic MicroDrivers, the SE112 delivers great sound with deep bass and impressive sound isolation, for a perfect audio upgrade with today’s portable digital devices. FEATURES Dynamic MicroDriver Featuring Dynamic MicroDrivers, the SE112 delivers great sound with deep bass and impressive sound isolation, for a perfect audio upgrade with today’s portable digital devices. Sound Isolating sleeves in multiple sizes block outside noise (noise attenuation up to 37 dB) and provide a secure, comfortable fit. Evolved from personal monitor technology that's been road-tested by pro musicians, the SE112 delivers detailed sound for personal listening or monitoring. Sound Isolating DesignComfortable sound isolating sleeves block up to 37 dB of ambient noise. Sound isolation technology prevents outside noise from interfering with your listening experience, whether on-stage or on-the-go. Shure Sound Isolating Earphones require a proper fit to achieve the best sound. Unmatched Personalization and Comfort Ergonomic, Professional Design Lightweight, low-profile shape with optimized nozzle angle is designed to rest comfortably in the ear. Over-the-ear configuration keeps cables out of the way. What's in the boxDrawstring PouchGray Soft flex sleeves (S/ M/ L) SpecificationsSpeaker type: Single Dynamic MicroDriverSensitivity: 105 dB SPL/mWImpedance: 16 ΩFrequency Range from: 25 HzFrequency Range to: 17 KHzCable length: 127 cm