Professional sound limiter that is easy to install and operate. The product features user set dB level, user set reset time, set up mode, anti tamper feature, 40 A contact breaker (4 pole allowing the following configuations 3 phase and neutral, 4 single phase live and neutral) and a discrete microphone (fits in to a BS1363 standard back box) which can be either surface or flush mounted. The unit continually monitors the sound level and reports the results via LED s on the front of the unit (green = 6dB below the pre set level, amber = approaching threshold, red = exceeded preset threshold and about to be switched off). Comes with a fire alarm interface.