The ASK-4®#101 is a single zone audio monitoring kit compatible with most recorders. The kit is designed for audio monitoring and for interfacing with a DVR. It is ideal for Live Monitoring Systems. The APR-1 desktop base unit has a speaker for monitoring live audio and playback. It contains a mute switch to mute both live and playback audio. The Verifact® A microphone is designed for ceiling mount applications.