The CANL-924 Standard Microphone Amplifier is ideal for voice and ultrasonic applications. It comes with a TDR-84 Condenser Measuring Microphone. The amplifier features a selectable gain of 100 or 1000. With a frequency range of 5 Hz to 100 KHz, this system can handle just about any recording requirements. There is a coax output for exporting the signal if the system analog to digital converter is not used.