Automatic Leveling When the pendulum is unlocked, the pendulum is free to automatically level In order for the Cross Line Laser to automatically level, the base of the unit needs to be within 5° of level When the pendulum is unlocked and the Cross Line Laser is within 5° of level, the unit will be in automatic leveling range, in this situation no LED light will be on Should the base of the unit be outside the 5° leveling range the laser beam will flash meanwhile an audibly warning will be sent out from Cross Line Laser The TUF Cross Line Laser is a precision instrument and should be treated with care When not in use, the pendulum should always be in the Off position Locking the pendulum allows the Cross Line Laser to better withstand vibration and trauma incurred during transportation or if the unit is dropped

Locked Line Angle In the locked line angel position, the pendulum is in the locked position and will not automatically level When in the locked line position, both two laser lines will be on and flash slowly The Red Lock LED will be on as well

Low Battery Alarm The Green battery LED will be on and keep flashing slowly when the working voltage is 3V At this situation the batteries are required to be replaced