Optical Smoke Detector EDA-R300 

Each analogue Millennium detector unit is powered by two lithium batteries, one providing back up supply to the other. The batteries are monitored throughout their life and any impending failure is pre-empted by an early warning giving a minimum of 60 days normal use before the failure occurs. 

In excess of 7 years battery life is achievable from this detector (5 years with combined sounder)

The unit sends a verification signal at regular intervals to confirm its communication path. Should any fire or fault condition be detected then that information is transmitted immediately. 

The LED on the detector will flash during a fire or fault condition and for 15 minutes afterwards unless the unit is reset manually within that time. Each unit has an internal sounder to give local indication of fire. Each detector has the facility for a remote unit with the wiring between them being constantly monitored by the transmitter unit.