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. With the touch of a button, instrument levels itself horizontally and vertically using electronic sensors and motors.Application:General contracting.Range:2,000ft.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.* Working range of up to 2000-ft. diameter when used with optional laser detector (sold separately). * Self-leveling range of 5degree(horizontal and vertical).* Powered by 4 D batteries (included).* Interior package includes laser, remote control, glasses, target, wall mount and carry case.