Model ALA-4TB is a four zone alarming base station with two-way listen and talkback designed to provide sound activated audio monitoring, when interfaced with Louroe speaker/microphones. Each zone has a variable threshold level (set by installer orowner) based on frequency and sound pressure that activates when a sound exceeds the set threshold level. A short alarm and lighted LED identifies the zone, along with a relay contact for activating a camera or other annunciation.Model ALA-4TB is rack mountable. Compatible with all Louroe speaker/microphones. For two-way communications.

Dimensions: 19" W x 5 1/4" H x 9 1/2" D