Features: Optical compensation: self-calibration realizes phase error compensation and calibration, reduces the impact of environmental factors on ranging errors, improves the measurement accuracy of laserranging, and increases the ranging stability of system. High energies laserbeam, low attenuation of 100meters, through the precisions focusing lens, the lasermaintains a high focusing state, and can ensure low beam divergences when measuring objects aboves 100meters, and the transmission and reception ability of light signal are both enhanced. High-speed processor, 0.1s fast test. Powerful processors can process a variety of complex algorithms, from pressing measurements to producing data, almost instantaneously. USB cycle charging 1 charge can be measured 8000 times 5. Double horizontal fuselages correction, there is a physical horizontal bubble in the horizontal and vertical directions of the fuselages, and various measurement modes help judge the Angles of the fuselages, so that the measurement is more accurate. Human sound broadcast measurement assistants are ready to handle all works environments without fear of dust and splashing,Large-capacity data storage for easy recording, no paper and pencil required, and frees use of Pro-level measurement modes. Specifications: Material: ABS Size: approx 112x50x25mm/4x2x1inch Power supply: 2x1.5V AAA(Not included) Standard: 40m/50m/60m/80m/100m/120m(optional) Package Includes: 1xDigital Distance Meter note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the difference between different monitors, the picture may not reflect the actual color of the item.