2 x Aico EI146E Mains Optical Smoke Alarms + 1 x EI144E Mains Heat Multi pack
2 x Aico EI146E Mains Optical Alarms + 1 x EI144E Mains Heat Alarm. EI146E - Optical Smoke Alarm (This unit replaces the EI146 and is back compatible with existing installations). EI144E - Heat Alarm.