7.1 surrond sound Gaming Headphones with Steel Structure & Vibration & Blue Light Effect Headphone: Driver unit: φ50mm Impedance: 32ohm±15% Sensitivity: 120±3db Ferquency response: 20Hz-20kHz Maximun powerinput: 100mw Cord: 2.2M Connector: USB Microphone: driver Diamerer: 4*1.5mm Impedance: 2.2kohm Sensitivity: -40dB±3db Directivity: Omni directional Operation voltage: 4.5V S/N ratio: 65dB