The XENA XA601 passive infrared zone alarm is a standalone battery-powered motion detector that fits to the ceiling of your garage, home, caravan or business. Conveniently remote-control operated, the XA601 features a four-part infrared sensor for increased sensitivity. The siren is triggered if anyone moves into the security zone. A 15 second delay allows the user to enter the disarm code without triggering the siren. Once triggered, the siren sounds for 30 seconds before resetting.