The Topcon RL-H4C is a construction-grade self-leveling rotary laser designed for grading, leveling, and site prep applications. Known for its unbeatable accuracy and long-range capability, the RL-H4C delivers ±1/16-inch accuracy at 100 feet and offers a working range of up to 2,600 feet with a laser receiver. With electronic self-leveling and slope matching features, the RL-H4C allows fast setup and precise grading—ideal for foundations, drainage, concrete work, and large-scale layout. The unit relevels automatically if disturbed and alerts you to misleveling, minimizing costly mistakes. Backed by a 100-hour battery life, it’s built to run all week on just four D-cell batteries. Rugged, weather-resistant (IP66) and jobsite proven, the RL-H4C is one of the most trusted lasers in the industry for professionals who demand long-range accuracy and consistent performance. Key Features: ±1/16 inch accuracy at 100 ft (1.5mm at 30m) 2,600 ft (800m) working range with receiver Electronic self-leveling and slope matching 100-hour battery life (4x D-cells) IP66-rated for dust and water resistance Audible and visual alerts for releveling