Check the listing for details. ALEAN 330ft Photobeam IR Sensor Photoelectric 3 Beam Intrusion Perimeter Barrier. Condition: New. Listed at 114.95 USD. Features:Photoelectric IR beam detector with digital frequency conversionMount transmitter and receiver, build a fence you can't see;When beam is blocked, alarm trigger;Alarm output NC/NO optional, compatible with other brand burglar alarm systems such as HONEYWELL, DSC, GE and BOSCH;Resistant to rain, fog, snow and frost;Built-in automatic adjustable strong light filtering system (up to 50,000 LUX);Good performance against direct sunlight, completely against fluorescent and car light;AGC circuit, the detector will automatically increase sensitivity when faced harsh environment;Easy alignment with visual LED indicator;PC engineering plastic material;Professional waterproof design with the rubber seal around;IP degree: IP65;Adopt microprocessor control (CPU), real digital circuit;Horizontal / vertical optical angle can be easy to adjust.