Features:
1.Easily installed on ceilings and supplied with mounting brackets.
2.Armed 24 hours. No need to arm or disarm.
3.Low battery warning signal transmitted to the control panel.
4.System ID Hopping code.
Power source: 9V DC alkaline battery.
Photo electric chamber – UL217 compliant
Dimensions: 6.5 x 8 x 8 cm.