Using optical lens, international high quality laser head components, accurate measurement, fast speed, low power consumption and long service life. Accurately measure millimeter quantification and observe while measuring with a measuring instrument to ensure millimeter measurement accuracy The laser module's standard class 2 laser is reliable and environmentally friendly, stable, professional optical system used indoors and outdoors, and built-in intelligent optical compensation system to meet various measurement needs. Humanized intimate design, humanized design, universal Android mobile phone data cable, you can charge anytime, anywhere. Support USB charging, fast charging, support power bank / computer / car USB charging When measuring distance, keep the bubble water drop horizontal in the middle to ensure that the rangefinder is level with the ground, so that the measurement is more accurate. Nine keys are more convenient to use, 9 keys one key one function, easy to understand and more convenient. Waterproof body, drop and shock resistance The whole machine is made of high-strength ABS engineering plastic, which is not fragile when dropped from a high place. The buttons are made of soft silica gel, which makes it look great. Product parameters: Specification model: H-40 Measuring range: 0.03-40Measurement Accuracy: 1, OMM Minimum display: 1MM Single measurement time: 0.1-4 seconds Unit of measurement: M meter) / FT (feet) / IN (inches) Laser quality: 635NMLaser Type: 1 MW Laser power: support Continuous distance measurement: support Area measurement: support Volume measurement: support Pythagorean measurement: support Area volume Pythagoras measures more or less: support Maximum and minimum measurement: support Data storage: 20 groups maximum Measurement reference switching: support Display illumination: support Buzzer: support Battery life: 15000 measurements can be taken Dust/Water Splash: IP54 Operating Temperature: 0-40Storage temperature: -20-60Automatically turn off the laser: 60 seconds Auto power off: 480 secondsSpecification: 12OMM*53" 39MM