Mains operated Photoelectric Smoke Detector with 9V battery backup. This alarm can be interconnected with up to 20 Hispec detectors through hard wire connection. This alarm is supplied with a FASTFIX, slide-on base with trunking knockout to make it quick and simple to install. As this alarm contains a 9V Alkaline battery backup, we recommend changing the battery every year. Grade 2 compliant. Manufactured in accordance to BS EN 14604:2005. Installation of this alarm should only be carried out by a qualified Electrician or competent person to the latest building and current IEE Wiring Regulations (BS 7671). For project pricing please call Team3Phase.