The Loox 720 comes equipped with an adequate built-in microphone at the base of the unit. The range and quality is however limited. If you wish to use the Loox 720 to record a lecture or interview, you may want to use an external microphone. This is possible through the inclusion of Audio-In via the headphone jack. It requires a 4-conductor jack audio jack with mic input currently know to be available at PC-Mobile to use with your choice of 3.5mm microphone.