Voice Activated Relay

- 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)