Long-Lasting 48-Hour Battery Life: Maximize productivity on long projects without recharging. The powerful built-in 4000mAh lithium battery supports up to 48 hours of land surveying operation, perfect for extensive farmland surveys, large property assessments, and all-day fieldwork High- Surveying & Portable: Take professional-grade surveying anywhere. Supports 6 satellite systems for fast, reliable positioning(area error&;0.002 , distance error&;5 feet) Measurement with One-Key Operation: Master land surveying instantly. This intuitive unit features 7 dedicated modes-each with a single, clearly marked button for one-key access. Simply press to measure land area (ideal for pastures and gardens), distance (straight or curved), height, slope, or save coordinates(save only, no edit) Sunlight-Readable 3.2" Color Screen: Enjoy clear visibility with our 3.2-inch color display. Featuring 240x320 high resolution, this large screen remains perfectly readable even under direct, bright sunlight Rugged & Ergonomic Design: Built tough for any environment. This unit features a waterproof and dustproof design. Its ergonomic contoured grip ensures comfortable using and prevents slipping, while the compact size fits easily in your pocket, Manufacturer: Ounfhtrttk