Seco-Larm E-960-D290Q Enforcer Twin Photobeam Detectors with Laser Beam Alignment, 290-590 Feet Sensing Range, NC/NO Alarm Output, N.C. Tamper Circuit Included, Non-polarized Power Inputs

Add reliable perimeter security to your home with a laser system that allows for fast, easy installation. The weatherproof, sunlight-filtering Twin Photobeam with Laser Alignment security system uses lensed optics and twin infrared beams to provide immunity to false alarms due to falling leaves, birds, or even inclement weather. Its built-in laser beam alignment system speeds accurate, reliable positioning: Just turn the laser on to align the sensors using the read beam and then turn it off for everyday use.