IMEX LRX10 Red & Green Beam Digital Millimeter Detector with Bracket 012-LRX10Take the guess work out of levelling with the mm reading Imex detectors. Up to 0. 5mm reading in up to a 90mm window. The Imex Digital Detectors range increases your accuracy and efficiency. Features: 90mm Detection Window Red or Green beam pick up 0. 5mm up to 10. 00mm reading increments Heavy Duty, Waterproof and Shockproof Made in GermanySpecifications: Detection Window: 90mm +30 to 30 Range: 300m Radius Detectable Spectrum: Red, Green Laser