1,Electronic self-leveling, 2,wide leveling range, 3,high precision and stability   Specifications:Laser wavelength: 635 nmLaser class: Class IIAccuracy: ±1/4"/100 ft. (±1 mm/5m)Self-leveling range: ±3°Power:  3x AA alkaline batterySize:  10" x23 5/16" x 2 13/16"(Ø80x188mm)Weight: 2.2 lbs. (1 kg)Features and FunctionsProject one vertical line, two horizontal lines, up & down plumb beamSelf-leveling, and laser flashing when beyond self-leveling rangeSwitch-able between the continuous laser and the pulse laser,         and compatible for both indoor and outdoor applicationsThe instrument is 360° rotatable'and also fine-adjustable in angleAble to be connected with the tripod by 5/8' thread

Automatic 500m Range Rotary Laser Level Self-Leveling