Johnson Level & Tool 40-6622 Heavy Duty Flooring Laser with GreenBrite Technology Projects a self-leveling laser cross on your work surface to easily layout your jobsite Generates two lines on the floor at a 90 angle for surface layout including tile, stone, brick, carpet and hardwood flooring Projects two laser beams over wet mastic or concrete Laser Class Illa, 5mW 3 Year Warranty: Johnson Level warrants this product against defects in material and workmanship for three years after the confirmed purchase date. At its option, the company will replace or repair the product if it fails under normal use.