The HQ51 headset designed with the bigger sort ear-cup to cover the whole ear from outside noise and suspension shaped wide headband which literally lift the weight right off your head to give the most comfortable pressure for a long gaming session. Technical Specifications - Mid-Size Over-Ear Gaming Headsets - Plug Type : 3.5mm jack - Driver Size : Φ 50mm - Cable Length : 2.M Cable - Weight : 340 gram (455 gram with packing) - Microphone Dimensions : 6.0*5mm - Microphone Sensitivity : -58dB+/-2dB - Frequency Response : 20Hz - 20KHz - Speaker Sensitivity : 95dB+/-3dB - Speaker Impedance : 32Ω+/-15% - Directivity : Omni directional