3 in 1: Infrared laser tape measure includes laser range finder, 5 meter tape measure and laser cross marking tool. Easily measure high ceilings and other hard to get to areas with the push of a button. With Self Locking Device: The crossed laser lines of this laser tape measure have a self locking device that automatically locked into position after pulling out the tape. It automatically retracts when the unlock button is pressed. Accurate Measurement: Laser distance tape can be used for measuring foundational levels, installing construction equipment, accuracy testing, bearing testing, automated inspections, and more. Data Storage: The laser tape measuring tool has built in storage function. It can be recalled at any time for viewing and storage. You no longer need to worry about not being able to find recorded measurements or losing data. Easy to Use: The laser tape measuring tool can measure area, volume and ticking in single or continuous measurements. Meanwhile, it has high