The Topcon AT-B4 Auto Level is a reliable and durable optical leveling instrument designed for professional applications in construction and surveying. Its 24× magnification and 32 mm objective lens provide clear and precise measurements, with an accuracy of ±2.0 mm over a 1 km double-run leveling. The AT-B4 features a magnetic damping compensator with a ±15′ range, ensuring stability and quick leveling in all conditions. With an IPX6-rated water-resistant design, it performs reliably in harsh environments. The minimum focus distance of 0.2 m allows for close-range work, making it versatile for various tasks. Lightweight, compact, and easy to use, the Topcon AT-B4 is the ideal choice for professionals seeking accuracy and reliability in their leveling tasks.