Low Voltage Electrostatic Technology: KZ ZEX has Electrostatic and DD hybrid technology configurations. ZEX's electret electrostatic screwdriver has better resolution characteristics, and the loss of high-pitched sound and extremely high-pitched sound is reduced to the maximum. So the sound can be reproduced properly. HiFi Wired Earphones: KZ ZEX is equipped with a 10mm double magnetic flux dynamic driver and the instantaneous reaction is fast. KZ ZEX also enjoys HiFi-level professional sound quality when connected to a mobile phone. Passive noise sound canceling, effectively protecting listening. Electret Low-voltage Electrostatic Unit: KZ ZEX's electret electrostatic driver is located in the sound guide tube of the earphone, so the loss of high-pitched sound and extremely high-pitched sound is reduced to the maximum. Brings better extendibility. The KZ ZEX electret electrostatic earbuds have better resolution characteristics, so the sound can be reproduced properly. 2-pin Interchangeable Cable Design: The 0.75mm gold-plated pin effectively prolongs the service life and adapts to a variety of standard 2-Pin upgrade cables. Wired headphones become TWS wireless earphones. Bluetooth upgrade cable and silver-plated upgrade cable are all available.