With the research and development and testing of technology and market research, the meter ZL199 of the mu meter has been upgraded as a whole. Upgraded to a six-star positioning meter,The accuracy can reach 0.01 mu and the positioning accuracy is 1 meter. Combines the advantages of all acre gauge instruments and is highly accurate. The machine can collect point, line, and surface data, or view real-time trajectory, real-time area, real-time altitude, and automatically identify slope size. It is equipped with a wireless micro-shaped printer, which can print out the measured time, location, area, size, graphics and other small receipts anytime, anywhere, or connect to the computer to export the measured time, location, and values ​​in the form of text or Baidu map to save and view.