Powerful 110db siren sounds when movement is detected by the magnetic sensor passcode protection allows authorized entry 2 settings chime sound alert mode amp 110db siren arm mode selection best for sheds garages caravans homes etc entry amp exit delays make it easy for you to turn the alarm on amp off specification power requirements 3 x alkaline aaa batteries 45v dc modes 2 alarm and chime chime mode 90db chime duration approx 2s re trigger de