Prism free ranging, ensuring reliable accuracy; Absolute encoding angle measurement; Backlit plastic keyboard; Full digital and subtitle keyboard, 

  2.7-inch display screen, 4-line Chinese display, adjustable display brightness; Built-in laser down pointing (optional); Data transmission and storage can be achieved with a large capacity SD card, and USB transmission is more convenient; 

  It has special measurement programs such as suspended height, eccentricity, opposite edge, distance coordinate lofting, road design measurement, etc.