The Bosch GRL800-20HVK is a professional-grade, self-leveling rotary laser kit designed for heavy-duty indoor and outdoor layout, grading, and leveling. The complete package boasts an impressive 800-foot working range with an accuracy of of an inch at 100 feet.

Key Specifications & Features Working Range: Up to 800-foot diameter (with the included laser receiver) Accuracy: in. at 100 ft Self-Leveling: Electronic self-leveling on horizontal and vertical axes Shock Warning: Features a disturbance monitor that warns you if the tool has shifted or been bumped, ensuring accuracy Durability: IP54/IP56 rating for dust/water resistance and a robust metal cage housing Laser is in great working condition. Please let me know.if your interested.