The single button internal outstation is a vandal resistant outstation with stainless steel fascia and mild steel painted back box. The unit has an integral microphone and speaker and is fitted with large vandal resistant call button and a call progress LED. The speaker and microphone volume are adjustable to suite the operating environment with a maximum output of 85dB for noisy areas. The unit is usually mounted in the refuge area and is used by refugees to communicate with the system operator in the event of an emergency. The standard unit is annotated in BLACK with the words REFUGE ALARM and PRESS ONCE TO CALL, alternative annotation is available on request. The unit can be supplied with surface or flush mount back box. This unit can be used with compact or standard Folknoll Disabled Refuge EVC systems.