Compatible with C-TECs entire range of 800 Series field devices. Housed in an attractive flush mounting plastic enclosure measuring just 214mm x178mm Two call levels standard (constant tone) and emergency (intermittent tone). Optional mute and call accept/reset buttons. Call Accept functionality allows staff to send an intermittent call acknowledgment signal to calling zones to confirm help is on the way (dependent on wiring and field devices used). Includes a 12V 300mA PSU and 2volt-free relay contacts which activate ona standard or emergency call. Innovative slide-in labelling system. Zones can be wired in 4 or 6 core (7/02) stranded security cable. Additional master controllers and expansion units available for use as repeaters on larger sites. Optional boxed PSUs c/wwith space for a 12V VRLA battery available for sites where a standby battery facility is required.