BLUETOOTH CONNECTIVITY: connects to a mobile device, linking to the free Bosch Leveling Remote App, to control sleep mode, Dual Dial-In Slope, and user calibration, guiding the user step-by-step to confirm tool status or calibrate the rotary laser to ensure accuracy on the jobsite. MULTIPLE HORIZONTAL APPLICATIONS: use for site preparation, grading a lot, stake-out for pouring concrete foundations/slabs, setting concrete forms for commercial or large residential construction, underground utility work including plumbing and more. DUAL DIAL-IN SLOPE: allows the user to adjust the slope angle on the laser on both the X- and Y-axes for excavation, drainage and concrete pouring.