The LR50W Laser Machine Display Receivers are designed to be used as a stand-alone display receiver on grading and excavating equipment including: dozers, excavators, backhoes, scrapers, and box blades. Key features & benefits: -Built-in blade tilt indicator helps the operator keep the blade level for increased accuracy and productivity ​-Center On-grade provides an equal amount of grade information above and below on-grade. Use on dozers, graders, scrapers and box blades ​-Built-in plumb indicator for fast, accurate grade checking in excavation applications ​-Offset on-grade gives you more range above grade using the entire receiver for more productive excavation ​-LR50W links wirelessly to the RD20 in-cab display