Store up to 99 sets of measurement data for easy reference and comparison, greatly improving work efficiency and also supporting data erasure. backlight display High Definition. The display is clear and delicate, with high brightness and can be used in bright or low light environments. The rangefinder uses a self-developed high efficiency filtering algorithm and is equipped with a lens High quality curved optics, which makes it more precise and faster than other products in the market. The range finder can measure the angle in real time while measuring the distance and instantly display the value precise angle on the screen. It is very useful in home and decoration construction projects. Rich and comprehensive functions, 0.2s fast measurement of distance, area, volume, indirect measurement by Pythagorean theorem , support for single and continuous measurement. Specifications: LASER RADIATION DO NOT LOOK INTO BEAM LASER PRODUCT CLASS 2 Wavelength: 500-650 nm, CW Laser radiation power: lt; 1.0 mW Measuring range: 70 m (optional) Accuracy: 2.0 mm Unit: / pi / in Digital angle measurement range: 0 -90 Laser type: 620-690 nm Laser class: Class II 1mW Single measurement time: 0.25 s Maximum data storage: 99 groups Automatic laser cut-off: 30 s Automatic shutdown: 180 s Battery: 3 x 1.5V AAA batteries (not included) Item size: 115 * 50 * 25 mm / 4.52 * 1.96 * 0.98 in Package weight: 194 g Package size: 15.5 * 11 * 5.5cm / 6.1 * 4.33 * 2.16inch Packing list: 1 * Rangefinder 1 * cloth bag Note: it does not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you