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/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 1/16 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.