KZ ZSN Quad-core Wired Control Earphone without Microphone 1. The combination of aviation aluminum alloy and resin, combined with the bright colors of fashion, make the overall appearance of the texture. 2. The second-generation ring iron hybrid drive, once again enhances the sound detail expression, has the shocking low frequency of the moving coil unit, and also has the powerful high frequency of the moving iron unit. The analysis is more rich and dicate, rolling traditional single- ring headphones. 3. The sound that the dynamic circle ca not show, the moving iron is supported by the compensation, and the professional-grade sound is presented. 4. The four-layer voice coil brings a stronger driving force, the low frequency is powerful, the sound fid width is extended, and the overall hearing is more appealing. 5. Professional ectronic crossover tuning technology. The precise internal acoustic structure design and subtle circuit optimization can separate the two sounding units separaty. The moving iron is responsible for interpreting the middle and high-ed parts, and the moving coil is responsible for interpreting the subwoofer to achieve d, clean and detailed sound . . 6. Improved 0.75mm gold-plated 2 Pin plug-in structure, limit slot protection design, effectivy protect the needle to prevent breakage, extend the number of interface insertion and removal and service life. 7. emble the Bluetooth module (sold separaty) and change into the Bluetooth headset in seconds. emble the upgraded wire (sold separaty) to improve the sound of the headphones. 8. 26dB noise reduction, no reducing pion. Wearing the headphones correctly without playing music can directly isolate the noise of about 26dB, so that you can listen to the music details in a noisy environment, and also better protect your hearing. 9. Durable wire, providing exclent sound signal transmission, anti-pull, anti-bending, anti-corrosion. 10. Ergonomic and acoust