Features  Ergonomic     design, adjustable head band  Suitable     for all 3.5 audio jack devices, with built-in volume adjustment on the   ear   case  For     Smartphone, PC, PS4, Xbox     One

Speaker diameter: 40mm with  mic
Impedance:  32  ohms
Sensitivity: 108dB
Frequency  response: 20Hz-20,000Hz
Cord