Choose from economical, single grade to advanced, steep grade laser transmitters. The GL600 series offers the most innovative features to help you get to grade faster with increased accuracy. Advanced features quickly translate into improved productivity for grading and excavation projects. Complex alignments are automatic and easy to perform. The powerful, long-range remote control means it only takes one person to accurate set up and operate the grade laser-even grade reverse. And you control all the transmitter functions from inside the cab of a machine.