The Spectra Precision Laser HL700 Laser Detector, a highly versatile laser receiver for basic and advanced leveling and aligning applications, is designed for general, concrete and site preparation contractors. The HL700 is an easy-to-use tool that accurately measures elevations across the site, and is ideal for use with any rotating red beam laser level. It features a digital readout of elevation that provides a numeric display of +/-50mm to 0.5mm resolution. The readout is displayed on the large front and rear LCD's and shows exactly how far the elevation is from on-grade. Accurate measurements can be made without moving the rod clamp, saving time and increasing productivity. Selectable units of measurement can be displayed to meet your specific application - mm, cm, ft, in or fractional inches. A 127mm long red pick-up window, more than double the industry standard, allows quick acquisition of the laser beam. An anti-strobe sensor prevents false readings from any adjacent site