The 8 Zone Fire has 16 programmable zones,16 sounder circuits & up to 32 fire detectors per zone. It features an unlimited number of call points per zone, an integral evacuates alarm button, repeater facility, Volt free fire change over relay, Volt free fault change over relay, Individual zone/sounder isolate & alarm delay options. It is CE certified & requires 1 x 12V batteries. (not included)