Compact and Lightweight, Single Dynamic MicroDriver per Side, Up to 37 dB of Noise Isolation, 21 Hz to 17 kHz Frequency Response, Detachable Cable, Gold-Plated 3.5mm 1/8" TRS Connector, Includes Fit Kit with Multiple Eartips, Zippered Carrying Case Included. The blue Shure SE215SPE are sound-isolating in-ear stereo earphones offering notable sound quality in a lightweight and compact housing. The special-edition headphones use dynamic MicroDrivers to deliver a frequency response of 21 Hz to 17 kHz tuned for extended bass. The detachable cable has formable wires that fit over the ears to stay out of the way whether you're listening on stage or at home. The gold-plated MMCX earpiece connectors enable easy swapping of cables. A personalized fit kit with multiple sizes and types of eartips is included to ensure that you get the best comfort and sound isolation possible. The in-ear design allows the earphones to effectively reduce ambient noise by as much as 37 dB. The gold-plated 3.5mm 0.12 TRS connector provides compatibility with most mobile devices. A zippered carrying case provides tangle-free storage.