Handheld Land Area Meter 2.4in Color Display Data Output Voice Prompts GPS Land Survey Measuring Instrument Item Type: Handheld Land Area Meter Material: ABS Function: S4 Positioning Accuracy: Approx. 2.5m / 8.2ft Initial Pressure Calibration: Support Normal Area Measurement: Support Mountain Measurement: Support Intelligent Slope Measurement: Support Fixed Point Measurement: Support Fixed Width Area Measurement: Support Ordinary Distance Measurement: Support Manual Distance Measurement: Support Height Display: Support Height Measurement: Support Trajectory Display: Support Unit Setting: Support Unit Setting: Support Time Display: Support Data Statistics: Support History: Support Lighting And Currency Detection: Support Dry Battery: Support Li Battery: Support Data Storage: 200 Voice Broadcasting: Support Data Export: Support Receiver Chip: High sensitivity GNSS receiver chip Receiver Antenna: Passive large sized planar antenna Efficient Startup: 1 second hot startup and 30 seconds cold startup. Area Accuracy: ± 0.005acres (0.16-0.5acres), ± 1% (over 0.5acres) (when HDOP is below 1.0) Distance Accuracy: ± 1 meter (within 100 meters when HDOP is below 1.0) Functional Features: Latitude and longitude display, altitude display, area measurement, distance measurement, land price calculation Data Statistics: Area statistics, distance statistics Area Records: 200 records Distance Records: 200 records Trajectory Display: The trajectory will be displayed in real time during the measurement process and can also be viewed in statistical records. Pressure Leveling: about 1 meter (pressure measurement, absolute altitude value needs calibration) (applicable only to S4), about 10 meters (GPS measurement, HDOP within 1.0) (applicable only to S4) HDOP Settings: Customize HDOP Settings Screen Display: Color screen (2.4 inches) Sound Prompt: Voice broadcast Working Temperature: -20 ℃ to 70 ℃ Storage Temperature: -30 ℃ to 80 ℃ Data Interface: USB interface, which can be used for charging Battery: 3.7V li ion battery 1800mAh X 1 [shipped with built in battery]