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1. Measure area and Length of any shape (containing mountainous land, slope and flat field). 2. Can display measuring value, figure track and automatically calculate price after measurement. 3. Vehicle-carrier measurement, distance can be adjusted according to needs. 4. Test data , graphics trajectory can be exported for printing. 5. Applicable Google map shows real graphics trajectory. 6. 2. 8 inch large colour screen that makes more clear and visually. 7. Efficient start-up: 30 secs for cold boot, 3 secs for warm boot.