Bosch Red 4000-ft Self-Leveling Indoor/Outdoor Rotary Laser Level with 360 Beam. Condition: New Model: GRL4000-80CHVK. Fully featured rotary laser – has Dual Dial-In Slope, CORE18V power, Bluetooth® connectivity, uCAL user-calibration and more Dual Dial-In Slope – allows slope angle adjustment on both the X and Y axes Dual Power Source – for extended runtime and option of a 4.0 Ah CORE18V battery or a battery adapter with four (D) cell batteries Durable design – engineered with a cage rubber overmold and an innovative handle design to stand up to the toughest jobsites; built to IP68 dust- and water-protection standards Bluetooth® connectivity – connects to a mobile device, linking to the free Bosch Leveling Remote App, to control sleep mode, Dual Dial-In Slope, and more uCAL – user-calibration guiding the user step-by-step to confirm tool status or calibrate the rotary laser to ensure accuracy on the jobsite Long working range – range of up to 4,000 Ft. With laser receiver, the laser accuracy of up to ±1/16 In. In horizontal mode and ±1/8 In. In vertical mode Vertical-beam functionality – provides a vertical beam at 90° point for layout, squaring and plumb applications Electronic self-leveling – allows for easy setup and use on the job.