PROFESSIONAL USE: Measures precise tilts in degrees, percent or millimetres/metres with an accuracy of +/- 0,1º (1-89º). Highly robust with IP54 protection against dust and splash water LASER-ACCURACY : Integrated laser for tilt measurement up to 30 m. EASY TO USE: Direction arrows and audible signals at 0 and 90 for easy alignment. And incline mechanism for fine adjustments on uneven surfaces. MAGNETIC HOLD: Strong magnets and two straps for securely fastening the instrument to workpieces ITEMS INCLUDED: GIM 60 L, 4 x AA Batteries and protective bag