– 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
– Accessories: PRS40C 12V DC Power Supply (Sold separately)