The Optex BX-100PLUS Boundary Guard is a discreet 30m photo beam sensor designed to protect building perimeters by detecting intruders before entry. Ideal for securing windows, roll-up doors, and other exterior access points, it offers easy alignment with visual and audible indicators, a light reduction filter, and up to 99% beam blockage tolerance. Its slender, attractive design integrates seamlessly with any architectural style, providing both security and aesthetic appeal.