The Spectra LR50 Laser Machine Display Receiver is designed to be used as a stand-alone display receiver on grading and excavating equipment including: dozers, excavators, backhoes, scrapers, and box blades. The easy-to-use LR50 features versatile 360-degree laser reception and works with all types of rotating lasers on all types of machinery for fast, no-hassle setup. Rugged and waterproof, the LR50 receiver withstands all weather environments. Internal isolating shock mounts protect the electronics. The LR50W is designed to be used with the RD20 Wireless Remote Display.