Features:MULTIPLE MEASURE MODE --- Manual Fixed Mode + Auto Slop Measure Mode + Vehicle Measure Mode, help you solve all kinds of terrain area measurement. This multifunction land area meter can you automatically calculation different shapes of area and also for curve line distance measurement. Slop mode, also called Pythagorean mode, which can measure a slop height and angle. Vehicle Mode can help you measure calculation the reaper machine running way and distance.LARGE SCREEN & REAL TIME DISPLAY --- 2.4-inch large screen with strong LED backlight for easy reading, clear at night. Three real-time display, real-time display trajectory, real-time display area, real-time display length.MORE ACCURACY AUTO TRACK --- Automatic track measurement, area and length can be displayed on the same screen. High - sensitivity encapsulated antenna guarantees the measuring accuracy. The area, length and trajectory can be obtained simultaneously by one measurement.LONG LASTING WORK --- Built-in 5.5wh very large capacity lithium battery, can be used for three days without worrying about power. Silicone material button, feel comfortable, wear - resistant and easy to use, never fade.50 SETS MEMORY WIDE APPLICATION --- With multiple measurement modes like distance, area and slop measurement,the area meter is ideal for farming, construction and industries, buildings, real estates, factories, warehouses, etc.NOTICE: This device do not support share document with computer Specification:Model: ZL-180Satellite accuracy: 0.8 mMeasurement error: 0.01Length and width measurement: YesManual fixed point measurement: YesVehicle mode measurement: YesAutomatic slope measurement: YesReal-time display graphics: YesThree real-time display: real-time display trajectory, real-time display area, real-time display length.Item Size: 140 * 58 * 22mm / 5.51 * 2.28 * 0.87inMeasurement mode:1. Manual fixed-point measurement2. Vehicle mode measurement3. Measurement of length and width modeVehicle mode measurementA. 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.Package List:1 * Land Area Meter1 * Instructions1 * Rope1 * USB Cable