1. Long press the “UNIT” button, you can freely select the unit between M / In / Ft. 2. The digital tape measure has a wide range of measurement methods, such as +/- function, area/volume measurement, continuous measurement, Pythagorean theorem measurement, etc. Accuracy: ±0.059in. 3. The screen display is larger than other digital tape measures. The high-end black and white reverse display screen makes the reading more clearly visible. 3. When pulling out with a tape measure, you can press the lock button to fix the tape measure, which is very convenient to use. 4. After fully charged, the laser tape can support 4000 measurements. The laser is automatically turned off (after 30 seconds), and the power is automatically turned off (after 3 minutes) Laser: 30m / 40m / 50m/60M Tape measure: 5m Store data: 20 groups Product weight: 400g Packing size: 5.3 x 4.9 x 2.6 inches Battery: 1 requires a lithium battery. (Built-in) Material: ABS