Mono Headset with Microphone, Clear Sound Technology. Over the Head Headset Design. Built-in Flexible Microphone. Convenient Volume Control, System Requirements:. Audio Device with 3.5mm Output. Specifications: Driver Unit:Φ30mmHeadset Impedance: 32Ω ±15%Headset Frequency Range: 50HZ-20 KHz Microphone Frequency Response: ...30Hz-16 KHzMic. Sensitivity: -58dB±3dBConnection Type: 3.5mm Jacks Cable Length: 6 Feet