- 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
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