Features:   A specially designed HD call microphone. Solid ergonomic wear experience. The standard of independent patent technology silicon tips. The lower the internal resistance of professional wire. Driver performance is tough,bass bursts are more powerful. Parameters:   Brand: KZ   Model: ZST Pro   Product Name :KZ ZST Pro Dual Driver Earphones         Earphone type: In-ear   Impedance: 18Ω   Earphone sensitivity: 108dB/mW   Frequency range: 20-20000Hz   Interface: 3.5mm Gilded   Plug Type: L curved   Cable Length: 1.2m   Whether can replacement cable: Yes   Driver unit: Balanced Armature Dynamic hybrid driver unit   Package: 1 pair  In Ear Earphones （without MIC coloreful)