Description:? - Superbeam Earbuds- Hi Definition Usb Boom Free Stereo Headset With Array Microphones And 3D Surround Sound Recording- Great For Music, Voip, Video Conferencing, Computer Gaming, Speech Recognition, Stereo Recording- Hi Fidelity Speaker Drivers With Acoustic Bass Expansion- Usb Soundcard With Digital Sample Rates For Hi Definition Audio- Binaural Microphone Placement For 3D Surround Sound Recording- Adaptive Beam Forming Noise Cancellation For Boom Free Microphone Voip Communications- Usb Hd Audio Adapter- Boom Free Microphone- Volume/Mute ControlMic Input:- A/D Conversion Resolution: 17 Bit- Thd + N: 84 Db- Supply Bias Resistor: 2.2 Ohm @ 3.3Vdc- Frequency Response: 20-20,000 Hz- Input Range: 0 - 1.25 Vrms- Dynamic Range: 95 Db- Record Gain Range: 6 To 33 DbStereo Output:- D/A Conversion Resolution: 16 Bit- Thd + N: 91 Db- Frequency Response: 20-20,000 Hz- Output Load: 32 Ohm- Output Voltage: 1.27 VrmsAnd-Sb-205B