The SDL50 digital level makes quick work of measuring height and distance in all types of environments—from low light to bright sunlight and artificial light. It provides unwavering accuracy in the field even in adverse environments such as tunnels, heat shimmer, and vibration. Its large internal memory, digital display, and simple operation ensure fast and accurate measurements. The SDL50 is an accurate, dependable digital level that combines user-friendly convenience with unprecedented cost performance. Used with Sokkia's unique RAB-Code (RAndom Bi-directional Code) staff, measurement capabilities are greatly improved. All the user has to do is aim the staff, adjust the focus, and then with a single touch of a key the SDL30 accurately measures height and distance. The results are indicated digitally on an LCD display to make all kinds of leveling work performed quickly and easily.