4 Beams Active IR barrier. Range: 60m. Basic version. Allows column, post or wall assembly. Ideal when there is not beams overlapping problems with others barriers. 2x magnification viewer and dials for horizontal or vertical alignation (Not necessary to use a screwdriver). Bright colours interior to facilitate optic alignment. Tamper (In transmitter as in the receiver). Anti-freeze/frost design. IP65.