"Brand: CCZ
Model: BC04
Cavity material: metal+PC
Driver: DD and BA
Frequency response range: 20-20kHz
Sensitivity: 102 +- 2dB
Impedance: 32+-2
O Interface: 2Pin-Z
Plug: 3.5MM / USB-C
Cable material: 4 cores 5N OFC silver-plated
Cable length: 120+-3CM"