20 watts of audio output
No wiring between stations, 120 VAC input to unit
Noise cancelling microphone
Range up to 2 miles
Transformer-isolated power supply
Short circuit protection of power transistors
No amplifier gain increase when signal is not present. This reduces system feedback and loading problems
Stainless steel construction , Type 304 brushed finish
Conformal coating on printed circuit boards
Sealed off-hook and page relays
Off-hook indication LED