Brookstone 4-in-1 Security Travel Mate Motion Detector Alarm , Personal Safety Alarm , Digital Alarm Clock, Spotlight Digital Alarm clock with backlight and stand detaches easily from the security component to place on a nightstand. Security component has a spotlight, motion detector and a personal shrill "panic" alarm with blinking light and (loud) siren to deter would be intruders. Detaches easily from the digital alarm clock component to hang on a door knob with the carrying strap.