Specifications: Customized 30095 moving iron unit, for your sensitive performance broader high-frequency resolution. (The upgraded 30095 moving iron unit has a more sensitive transient performance, and has a huge jump in the dynamic performance of music, instantaneous detail performance and sound density.) The voice is full and mellow at low frequencies. Compared with the previous generation of moving coil unit magnets, the volume increases by 30%, and the frequency response increases by 1KHz position sensitivity by 5dB. Precise internal acoustic structure and fine circuit optimization can achieve reasonable frequency division of low, medium and high three frequencies, and increase the separation and hierarchy of music. Modified 2pin plug-in structure, equipped with bluetooth-compatible module, upgraded to bluetooth-compatible headset. Limiting slot protection design, 0.75mm gold-plated plug pin, effectively protect the plug pin to prevent breaking and prolong the number of plug pin and service life of the interface. The shape of human auricle is collected by big data, and the ergonomic shape is designed on this basis, in order to create a superior wearing experience for you. The customized microphone uses dual capacitor design to support standard interface-based high-definition mobile phone calls. Professional wire scheme, anti-pull, anti-twist, anti-corrosion, providing excellent sound quality signal transmission. Item Name: Wired Earphones Cavity Material: Metal + Plastic Vocalism Principle: Coil Iron Mixture (1DD + 1BA) Frequency Response Range: 7Hz - 40000Hz Impedance: 24 Omega; Sensitivity: 112dB Plug Type: 3.5mm Pin Type: 0.75mm Wire Replacement: Supported Features: Wired, Heavy Bass, HiFi, In-ear, Portable, Detachable, Hybrid Cable Length: 125cm plusmn; 5cm/49.21inch; plusmn; 1.97inch; (Approx.) Notes: Due to the light and screen setting difference, the item 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Wired Earphones 1 Pair of Eartips 1 x User Manual