Spectra Precision GL622 Auto Grade Match Instruction 

Easy-To-Use, Full Featured Automatic Grade Lasers. The GL622 is a dual grade laser. It is rugged automatic self-leveling laser featuring grade capability of ± 25% and can be used in a wide variety of grading, excavating and alignment applications by general and specialty contractors. The GL622 includes the RC602 full-function radio remote control which offers advanced automatic features like Grade Match, PlaneLok and Automatic Axis Alignment. The remote as well as the transmitters have an intuitive graphic display which is back-lit for ease of viewing.
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