The Automatic Level device from the SOKKIA brand, specifically model B40A (or the nearby series B20/B30/B40 as shown in the user manual), which is a surveying instrument used in leveling and elevation monitoring with high accuracy in engineering and construction projects. Key specifications of the device: Usage: Measuring elevation differences and topographic leveling. Features: Water, dust, and moisture resistant, and it has an automatic compensation system to maintain line-of-sight stability.