Aico's Ei141RC Mains 230/240V AC Ionisation Smoke Alarm with 9V alkaline battery back up (included) Interconnectable with up to 20 other alarms, if one sounds all sound. Built in Test / Hush button. Memory function indicates if an alarm has been previously activated. One person test feature. Low battery warning. Kitemarked to BS EN14604:2005 Can be interconnected by hard wiring (cable) or used with Aico radio wireless bases (EI168RC). More responsive to flaming fires (Papers, Clothing). Proven long life ionisation sensor. Third Parth Accredited by BSI BS EN 14604:2005 KM 552831 For use in Bedrooms
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