Monitors audio activity over a wide range of input voltages.Two sets of C-form (both N.O and N.C) relay contacts respond to audio activity.Four levels of signals: microphone, 600-ohm line, 25V, and 70V speaker systems.Built-in balanced, low noise, high gain microphone pre-am.Transformer-isolated, 600-ohm small signal level output of detected audio available.Works with self-amplified or central-amplified paging systems.Separate microphone pre-amp gain control.Adjustable release delay: 0.25s to 25s.Trigger threshold adjustment.Relay active indicator light.Dimensions: 3'' H x 8.5'' L x 7.25'' W.Color: Black.Country of Origin: Korea.
