An ultra-dependable intruder alarm, that uses the latest in passive infrared technology to protect a room from intruders. Mini Alert Motion Detector produces a infrared triangle. This battery operated intruder alarm, creates a barrier that's impossible to penetrate without setting off the alarm! 

The beam is virtually impossible to see and is unaffected by room lights, sunlight or other external light sources. Battery operated, the Mini Alert Motion Detector need no wiring and can be easily moved to a new location. Mounting bracket included. Requires three "AA" batteries.