1 channel 30 m self powered double beam infrared barrier. Valid for interior or exterior. Detection by simultaneous cutting of the 2 beams. Automatic gain control. Optical pointer for easy alignment. Simultaneous horizontal / vertical regulation of all beams. Anti-fog protection. Alignment measurement output for precise adjustment. Adjustable response time. IP55 environmental protection. Compatible with most radio transmitters (not included). Power supply 2 batteries in TX and 2 in RX not included. Battery type: 3.6 V type SB-D02HP or 3 V type CR123 ref. PL30 (requires CRH-5 bracket). Low battery indication output and led. Tamper outputs on front cover and back box. Operating temperature: -20 to 60ºC. Dimensions: 295 x 69 x 117 mm.