NLC USB Desktop Microphone Stereo with Stand for PC laptop Compliant with USB 2.0 full speed operation Compliant with USB audio device class specification V1.0 Supports USB suspend/resume mode 48KHz recording sampling rate for Mic application in record only mode Compliant with Win 2000/XP/7/8 and Mac OS X Sensitivity Range: -58+1 dB at 1KHz (0 dB=1V/uba)RL=2.2K VCC=3.0V