30 m self-powered double beam infrared barrier. Valid for interior or exterior. Detection by simultaneous cutting of the 2 beams. They have 4 selectable frequencies or channels and a circuit for environmental disqualification. 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 Vdc / 13 Ah lithium D type, ref. LSH20. Battery life of 5 years in AX-100TFR model and AX-200 TFR model, 3 years in TX and 5 years in RX. Low battery indication output and led. Tamper outputs on front cover and back box. Operating temperature: -20 to 60ºC. Dimensions: 217 x 88.1 x 162.5 mm.