The Spectra Precision LL300N Self-Leveling Laser is ideal for elevation controls, excavations, basic slopes, leveling forms and footers, concrete pours, and more. It features one-button operation, highly rugged design, and a single-axis slope mode that provides grade matching with a self-leveling cross axis for improved accuracy. With a working range of up to 1,650 feet, this rotary laser also includes a laser receiver for enhanced reception outdoors. Self-leveling horizontally within ±5 degrees, the LL300N has an accuracy of ±3/32 inch per 100 feet and a 600 rpm rotation speed.
It has a removable rotor cage that enables unobstructed 360-degree coverage and a 5/8-11 thread that allows you to mount it horizontally or vertically to a tripod. To avoid inaccurate readings, this laser level also features an out-of-level alert that shuts off the unit when knocked out of place. Its patented lighthouse seal protects the rotor head and glass and offers superior drop protection. Using four D-cell alkaline batteries, this rotary laser works up to 90 hours and approximately 45 hours with the optional rechargeable NiMH batteries.