Speakers: Diameter:40mm (1.57') Speakers: Frequency:20-20kHz Speakers: Impedance:32 Ohms +/-15 % Speakers: Sensitivity:110dB +/- 3dB Microphone: Diameter:6.5mm (0.26') Microphone: Sensitivity:-58dB +/- 2dB Microphone: Impedance:2.2kOhms +/- 15% Microphone: Cord:With function control button Cable Length:2m (6.56') Connector:USB 2.0 Port