The AUD-18 option allows audio to be recorded along with the waveforms for the Dash 18.
Connect the AUD-18 to the USB port and record AVI audio files snychronized to the waveform data.

Specifications:
Interface: Universal Serial Bus port
Frequency Response: 80 Hz - 12 kHz
Speaker Diameter: 28 mm
Ear Cushions: 4 mm foam
Cable Length: 3 meters
Part Number: 26514001