Waterproof and dustproof, dust will not affect the normal operation of the instrument and prevent water splashing from all directions from entering and damaging the instrument. Made of aluminum alloy, small body and compact mode fits the hand perfectly, provides a comfortable grip, and provides you with convenient operation. m / in / ft, 3 kinds of units, switch anytime. Support continuous measurement, surface volume measurement, Pythagorean measurement, addition and addition measurement subtraction, addition and subtraction of surface volume, peaks and auto-calibration functions. This laser distance measurement has the function of automatically calculating the area and volume. When using this laser measuring tool, no manual calculation is needed, which improves work efficiency. Easy to use, only one button and one measuring wrench are needed for operation. Without climbing the stairs, you can easily measure hard-to-reach areas, such as high ceilings. Spec: Item Type: Laser range finder Material: aluminum alloy Color: as shown in the picture Product size: approx. 90 x 25 x 13mm / 3.54 x 0.98 x 0.51inch Weight: approx.60g / 2.1oz Battery: Built-in lithium battery of 200 mAh, 3.7 V Measuring range: 0.05-40 m Measurement time: 0.1-3 seconds Dustproof and waterproof: IP54 Electronic level: 0-90 degree, error of 1 degree lt; / a Automatic laser shutdown: 15 seconds Automatic shutdown: 45 seconds The number of times that can be used has Quantity: 1 piece Note: this 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