This is Alarm Two Beam Photoelectric Infrared Detector. Integrated design, installation brackets, the most convenient installation. Holographic spot real-time report. Unique displacing receiving, transmitting parts with big power. Full function checking, self-adaption in environment and trouble locking. Patented balanced checking, unique digital filtering. Safety Photo Beams For Gate Openers - This photo eyes are a valuable safety feature that will keep the gate from closing when any obstruction is in the path of the photoelectric beam. - The photo eyes use Dual Beam and Through Beam technology, which are more reliable than reflective beams because they do not allow sunlight to create a false reading - The photo eyes need to be direct wired into the gate opener's circuit board with low voltage wire. We recommend using 16 gauge, multi-stranded, dual conductor, low voltage wire for all gate opener installations. Features Anti-glare up to 50,000 LUX, built-in automatic adjustment strong light filtering system, avoid glare or lighting of car Unique optical design: optical glass, beam penetrates the special multi-layer anti-environment (such as rain and snow) and other capabilities Automatically increase sensitivity when faced with fog or inclement weather Optional dual aspheric fresnel or secondary focusing lens to achieve a large-diameter light beam Automatic environment recognition circuit (EDC), avoid reflective interference modular Horizontal / vertical optical angle easy to adjust, easy to calibrate High levels of resistance to RFI / EMI capability Unique digital filter circuit design 99% photographic margin Built-in optical sight Anti-lightning circuit design Use of C-type output device Adjustable beam interdiction cycle is more flexible and adaptable The integrated structure designed to be able to work in harsh environment Specifications Range 9.2m / 33ft No.of Beams 2 beams Detection Mode 2 beams blocked simultaneous Optical Source Infrared digital pulse beam Response Speed 50 ~ 700msec Relay Contact Output NO.NC Contact Rating AC/DC30V 0.5AMax Power Supply DC 13.8 ~ 24V AC 11 ~ 18V P ?15W Operation Temperature -25? - 55? Operation Humidity 5% - 95% RH (relative humidity) Dimension 8 x 7.6 x 16.1cm/3.15 x 2.99 x 6.34"(L x W x H) Color Black Product Weight 29.42 oz Package Includes 2 x Alarm Two Beam Photoelectric Infrared Detector 1 x Installation Accessories 2 x Manual