1. This 3-in-1 laser tape measure combines a traditional tape measure, a laser distance meter, and a laser cross-line marker, supporting measurements for the Pythagorean theorem, area, volume, and various units (such as feet or inches). The laser technology provides exceptional accuracy, ensuring you can measure easily and precisely anywhere. 2. Historical Data Storage:This digital tape measure features multiple measurement functions, including single measurements, continuous measurements, area measurements, volume measurements, and Pythagorean theorem calculations. It is also equipped with a historical data memory function that can store up to 20 sets of measurement data, making it convenient for you to review and record at any time. 3. High-Precision Laser Measurement:Offering six laser measurement modes with an accuracy of up to 1 or 16 inch, it meets diverse needs. Functions include distance, continuous measurement, area, volume, and Pythagorean method (two-point and three-point measurements). It also allows for calibration, reference position changes, and unit settings. The automatic shut-off feature turns off the device after 120 seconds of inactivity, extending battery life.Laser class is class 2, laser power 1mw 4. Safe Self-Locking Design:This 3-in-1 tape measure features an automatic locking function that secures the current measurement position, ensuring a and reliable measuring process. After extending the tape, pressing the unlock button allows for automatic retraction, preventing hand injuries and enhancing . Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.