The stanley intelli scl fat max cross line laser projects 1 horizontal and 1 vertical line to create a cross line v130h130 the out of level indicator will make the laser lines flash onoff as a warning it has a magnetically dampened pendulum for auto self levelling and magnetic pivoting base it is ip54 rated protected against splash and dust damage specification level accuracy 03mm at 15m self levelling range4working range 10m 25m with detector power 3 x aa batteries supplied laser class 2thread