Simply open the battery door at the bottom, insert 3 'AA" size
or (UM3) batteries as indicated by the internal marking, then close the battery door.
Push the control knob to specified sign for Alarm or Visitor Chime.
It works by means of Passive Infrared motion sensor which detects moving human body within a range of 8M x 80 degrees.
The Alarm sounds automatically when any human body approaches the detected zone.
A siren will sound for one minute then shut-off automatically and reset itself.
A pleasant "Ding Dong" melody sounds automatically to
greet your visitor, when they approach the detected zone.
(C) LOW BATTERY INDICATOR
LED indicator at front will be on all the time when the batteries
are getting low to the point that you need to replace the batteries.