iSK SEM6 In-Ear-Monitor (IEM) High Resolution Monitoring Earphones for Professional/Street use - Ideal for Everyday Listening Product Specifications: Driver Diameter - 10mm/ Impedance - 16 / Sensitivity - 93  3dB / Frequency Response - 10Hz  28kHz / Cable Length - 3m/ Connector - 3.5mm + 6.3mm (1/4 inch) Stereo Adapter Utilizing advanced custom micro-driver, powerful bass, clear & natural treble, exquisite, full, precise and true sound, fashionable design, small in size and portable. Ergonomic design, with a range of flexible single layer and tri-layer silica gel ear-plugs to ensure a complete seal from any external noise to achieve maximum noise isolation and optimum sonic performance. With 3M non-tangle cable, light-weight and easy to manage while wearing and storing, it is also easy to shorten the cable length with the attached Velcro strap. Also the included 6.3mm (1/4 inch) gold plug lets you connect to various professional equipment for professional monitoring purposes. Package Includes: SEM6 1pc/ 6.3mm (1/4 inch) gold plug adapter 1pc/ hard-shell carry/storage case 1pc/ cable clip 1pc/ small & large size ear-plug 1 pair each/ small & large size tri-layer noise proof ear-plug 1 pair each/ Velcro strap 1pc