Features: 2.4-inch large screen with strong LED backlight for easy reading, clear at night. Automatic track measurement, area and length can be displayed on the same screen. Three real-time display: real-time display trajectory, real-time display area, real-time display length. Built-in 5.5wh very large capacity lithium battery, can be used for three days without worrying about power. The high - sensitivity encapsulated antenna guarantees the measuring accuracy. Silicone material button, feel comfortable, wear - resistant and easy to use, never fade. The area, length and trajectory can be obtained simultaneously by one measurement. Specification: Model: ZL-180 Satellite accuracy: 0.8 m Measurement error: 0.01 Length and width measurement: Yes Manual fixed point measurement: Yes Vehicle mode measurement: Yes Automatic slope measurement: Yes Real-time display graphics: Yes Three real-time display: real-time display trajectory, real-time display area, real-time display length. Measurement mode: 1. Manual fixed-point measurement 2. Vehicle mode measurement 3. Measurement of length and width mode Vehicle mode measurement A. The harvester, rotary machine, seeding machine and so on are directly put on the car; B. Set the working width (cutting width) of the fuselage, and the machine will automatically record the running track; C. Walking length x fuselage length = operating area. Manual fixed point measurement: A. Enter the manual fixed-point mode and press the "start" button; B. Press "start" button once at each inflection point to add a fixed point; C. After returning to the starting point, press the "ok" key and the machine will display the measurement results. .