This blue alarm and strobe helps alert you to any unauthorized use, theft or vandalism of important devices, as well as unauthorized exits and entries. The combination of alert and super bright flashing LEDs offers excellent protection for an array of circumstances as they draw attention in a hurry. When installed, the Select-Alert emits an ear piercing siren and the LEDs flash when the protected unit is opened. Select-Alert allows you to choose its function and can be used as a cabinet alert, door/exit alert, flashing light linked with a push button/switch, tornado siren, or an alert for many types of emergency situations.