Easy to operate and ready for immediate use, the intuitive GRL 400 H one-button rotary laser is ready for use at any time for levelling work outdoors. The one-button keypad, electronic self-levelling and practical battery compartment make for uncomplicated employees with easy set-up and simple battery changes without even having to move the tool. With an accuracy of ± 2.4 mm at 30 m and an ADS vibration warning system that indicates whether the position of the tool has changed, the GRL 400 H prevents levelling errors and delivers consistently accurate results. From determining cut and fill levels for excavations and foundations to levelling concrete forms and landscaping, this tool does an excellent job. This rotating laser is prepared for the harsh conditions of any outdoor construction site thanks to its IP56 water and dust protection. 2 x 1.5 V LR20 battery (D), non-rechargeable battery compartment, LR laser receiver, carrying case, 1 x 9 V block battery (6LR61).