The single zone non-alarming Louroe Electronics LE-137 Audio Base Station provides one-way live audio with a built-in 3” (76mm) speaker. Equipped with a Louroe microphone, this unit contains input/output jacks to connect to a DVR/VCR for recording and audio playback. Other features include adjustable volume control and a 3.5mm headphone jack. This audio monitoring base station can be used in convenience stores, polices interview rooms, booking rooms, speech therapy labs, casino soft count rooms, fast food restaurants – basically any place where CCTV cameras are installed. This base station is rack mountable on a 19' (482mm) rack.