Conventional DLC diaphragms are manufactured using DLC coating technology and other carbon-based nanomaterial synthesis processes. CCA, on the other hand, has improved the diaphragm to be thinner and lighter than conventional ones, achieving superior overall performance, including faster vibration response speed, wider frequency response range, and lower distortion. Sensitivity: 107±3dB Cable: Silver-plated wire, Plug: 3.5mm gold-plated plug Interface: 0.75mm dual-pin Impedance: 23Ω No microphone No box Includes: Main unit, cable, and eartips Please understand that this is a used item. Thank you for viewing.