The Spectra automatic self-leveling GL1425C dual grade laser is the most rugged, cost-effective laser that does three jobs - level, grade, and vertical alignment. Even in harsh job site conditions, the GL1425C delivers consistently reliable and accurate performance, enabling you to work faster (up to 900 Rpm) and smarter. The GL1425C comes with Bluetooth built-in and has a dedicated Laser Remote App. The GL1425C has Bluetooth built in so it can work with the Spectra Precision laser remote app an