Self-Leveling & 2 Modes AvailableIn Auto Mode, Self-Leveling Mode provides 4 slope range. Laser self-leveling. Otherwise, beyond a 4 inclination, the laser beam flashes to trigger an alarm, indicating that it is no longer level. Locking the pendulum into manual mode, the auto-leveling function is disabled and locked so the device can be used at all angles. HIGH VISIBILITY AND ACCURACYThanks to the powerful diode laser, the laser lines are very distinct and easily cast a bright red cross at a 110 angle. Horizontal line accuracy: 2mm/10m (radius). Vertical line accuracy: 2mm/5m (radius). Range: 15 meters. Perfect for construction workCan also be mounted on a 1/4" tripod (not included). Can be freely rotated 360 for work. Sturdy and durable , Anti-drop] IP54 dustproof and waterproof guaranteed to work in difficult conditions. 1 meter drop on six sides of the ground without loss of function or accuracy. WHAT YOU GET1*Laser Level, 1 x English User Manual. 1*Canvas Carrying Case, 2*AA Batteries. 12 Months Warranty. Note: The device is not suitable for extreme sunlight