Product description：

Power supplied DC9V battery and back-up source

110V-240V AC mains power supply

Supply voltage DC12 to 30 volts

Interconnect up to alarms

Photoelectric sensor

Red LED mains indicator light to confirm mains power supply

Green LED mains indicator light to confirm mains power supply

Unique" battery missing" lockout

Hush feature to silence nuisance alarms

Low battery alarm

Test button

Relay contacts-volt free with Normally Open and Normally Closed

Options and rated to 24 volts /1amp resistive

High sensitivity

Alarm supplied with "connector plug" for ease of installation