Feature: 1. Land Measure Tool: The land meter can measure the area and perimeter of any shaped parcel and the length of any two points or any way. 2. Smart Calculation: After the measurement is completed, the measured value, the graph track and the area can be displayed automatically. 3. Storage and Check: Can save and record 100 historical data and graphic tracks. History can be viewed, queried and deleted at any time. 4. Simple in Setting: Can set the conversion of area unit, length unit, etc. as well as setting automatic and manual measurement methods. 5. Various Functions: Can connect to a computer to export data and print. Also integrates night lighting, backlight and other functions. Specification: Item Type: GPS Land Meter Material: ABS Plug: US Plug 100-240V Battery: 1 x Built in 3.7V battery with 2000mAh capacity. Area Measurement Range: 0-99999999.99m². Display Unit: acre, h·m², k·m², m². Area Measurement Error: 1-2% in an area less than 0.5 acre. ≤ 1% in an area greater than 0.5 acre. Length Measurement Range: 0-99999999.99m. Display Unit: m, km. Length Measurement Error: 0.5-3 meter Working Hours: 8-10 hours. Charging Time: 4-5 hours. . Package List: 1 x GPS Land Meter1 x Charging Adapter1 x Charging Cable1 x User Manual1 x Storage Bag