If you use a condenser microphone, make sure to choose the U3C. U3C Complete Condenser System. 2.4 GHz ISM worldwide open band 2.4 GHz ISM worldwide open band. The U3 system features high-resolution, 24-bit / 48 kHz audio, a wide and smooth frequency response between 20 Hz and 20 kHz, and a signal-to-noise ratio of 107 decibels.