Photoelectric detector 2 beams 60m outdoor and 120m indoor, four channels by OPTEX. 10.5-28VDC, maximum consumption 44mA, NO/NC, tamper, antifreeze design IP 65, operating temperature: -25 +60C, includes 14kV lightning protection circuit and AGC circuit. Dimensions: 17 x 6.5 x 6.95 cm.