GJD Mini Opal Motion Detector is an adjustable range PIR with front and rear tamper switches as well as sliding curtains to aid installation and field of view alignment. Modelled after the modern and stylish look of the D-TECT range of detectors. GJD Mini Opal detectors are designed for outdoor use in conjunction with the Sapphire Mk3, Emerald Mk3, Solitaire 2 zone expansion unit, DygiZone 4 zone lighting controller/enunciator and 4 Zone expansion unit, GJD indoor lighting controllers.