The CST/Berger electronic self-leveling horizontal/vertical dual-beam, dual-slope rotary laser level is designed for contractors and offers fast and simple leveling power to handle the toughest jobs with less manpower. Instrument levels itself horizontally and vertically using electronic sensors and motors. Features a working range of up to 2000-ft. diameter when used with included laser detector.Application:Contractors.Range :2,000.Accuracy:+-3/32in at 100ft.Battery Type:D.Battery Included:Yes.Laser Output:Dual beam.* Instrument levels itself horizontally and vertically with touch of a button. * No more fussing with leveling screws or level bubbles. * Built-in anti-drift system or height of instrument alert warns operator that instrument has been moved.* Working range of up to 2000-ft. diameter when used with included laser detector.* Self-leveling range of 5degree(horizontal and vertical).* Powered by 4 D batteries (included). * Detector package includes laser, remote control, laser detector and carry case.