Ei650i Battery Optical Alarm Functioning as a standalone unit, the Ei650i Optical Alarm is best for detecting slow, smouldering fires commonly produced by electrical fires or flammable materials. This optical fire alarm is best placed in the hallway, landing, living room, or dining room. Optical sensor with dust compensation technology Built-in AudioLINK+ Battery-powered with a sealed-in lithium battery Easy to fit – twist on base and multi-fixings with anti-tamper locking option 10-year life Exp Date Mar 2034 Large test button Standalone unit Kitemarked to BS EN 14604:2005 Brand New
eBay