Tri-Tronics Leading Edge Light Screen. MADE IN THE U.S.A.! Exceeds all ADA Requirements.* Immune to any ambient light, including strobes, fluorescent, and direct sunlight * Weatherproof, fully functional from -25 degrees F to +158 degrees F (waterproof models also available) * Can be installed on either center or side sliding doors * 64 redundant IR LED's * Diagnostic LED indicators in both arrays and in the power supply monitor all critical system functions * Dual voltage power supply 120/240 VAC *1.57"W x 81.125"L x 75"D * Cable Length:5 ft, connectorized * Distance between bottom of receiver housing and highest detector:4" * Range:p to 16 ft