Dynamic Driver Hifi Earphone. This KBEAR Opal in ear headphone uses the 10mm Bio-cellulose diaphragm dynamic driver, Provides you a V shape sound feature. This earphone would perform better on POP, Rock . Pre-shaped Detachable Standard MMCX Cable. The cable of this KBEAR Opal earphone is MMCX standard, you can easily change the cable at your own needs. Also support MMCX bluetooth cable, but do not include in this item, you need buy it separate. Standard Stereo 3.5mm L Type Connector can perfect suit for most android phones, 3.5mm music player and other device. Handmade Carbon Fiber Panel amp; Ergonomic Noise Cancelling Design. The panel uses the real Carbon Fiber and resin material to protect it, the pattern would be showed different if you see from different ways, More fashionable. Ergonomics and Soft Design-Highly Elastic TPE Material and Silicone can better enclose ear canal. Noise Isolating design and the silicone earbuds allow you to fully immerse into your music with any other distraction. Burn In Before Listen. Earphone sound would become more fluently and well after fully time burn in time, this may help earphone driver unit reach perfect working condition. Earphone Specification : 1. Product Name: KBEAR Opal 2. Brand: KBEAR 3. Model: Opal 4. Earphone type: In Ear Earphone 5. Impedance: 1610% 6. Earphone sensitivity: 1023dB 7. Frequency response range:20Hz-20KHz 8. Plug Type: 3.5mm L Plug 9. Cable Length: 1.2m3cm 10. Color: Black Carbon 11. Whether with cable:Yes 12. Earphone connector:MMCX connector 13. Whether with mic: No mic 14. Whether can replacement cable: Yes 15. Driver unit:1 Dynamic Driver