SELF-LEVELING: The level features a self-leveling compensator with transport lock that protects the pendulum in the carrying case against damage and loss of calibration. ACCURACY: The optical level is accurate up to +/- 1/16 inch at 100 feet. DURABLE: The optical level is IP54 rated to withstand tough jobsite conditions such as rain or dust. VERSATILE: The optical level offers both horizontal and vertical crosshairs and stadia lines to measure level and alignment and estimate distance. LARGE APERATURE: This allows for more light for a sharper image. EASY-TO-USE: Equipped with a circular buble vial with 90 degree mirror for easy and fast set-up. MAGNETIC DAMPENING SYSTEM: The magnetic dampening quickly settles the system and reduces the effects of jobsite vibration.