This wireless Smoke Detector can be easily installed on ceilings and has it's mounting brackets included.
A 9V battery is included and holds this device for 18 months.
Low battery warning signal transmitted to the control panel.
Armed 24 hours. No need to arm or disarm.
Range 150 Feet (50 Meters) in open air.
WA-1100, detects automatically each smoke detector and save it as a new.