Bosch GRL4000-80CHK 11" Self Leveling Horizontal Rotary Laser Kit 18V with uCAL user-calibration delivers a comprehensive solution for precise outdoor and indoor leveling. It has a Dual Dial-In Slope feature that allows slope angle adjustment on both the X and Y axes, for grading applications. This laser is powered by a Bosch CORE18V 4.0 Ah battery, providing extended runtime. The rotary laser is compatible with 4.0 Ah and 8.0 Ah Bosch CORE18V Li-ion batteries. It also features an alkaline adapter to use four (D) cells. The REVOLVE4000 is engineered with a cage overmold and an innovative handle design, and it is built to IP68 dust- and water-protection standards. It features Bluetooth® connectivity to a connected device, linking to the Bosch Leveling Remote App. This app controls on/off, Dual Dial-In Slope, and more. The rotary laser features uCAL, for user-calibration, taking the user step by step through the calibration process. This avoids tool down time and provides confidence that the laser is accurate. It delivers accuracy of ±1/16 In. at 100 Ft. and a range of up to 4,000 Ft. with laser receiver. The comprehensive kit includes an 18V 4.0 Ah battery and charger, alkaline battery adapter, laser receiver, aluminum tripod, sturdy grade rod, and durable hard carrying case.