laser range meter 1,with range 80m, tilt sensor 2,multi function 3,simple use portable automatic self-leveling laserPD-58 Technical Data ... measurementusing PythagorasAvailableTilt measurements:Tilt sensor:Accuracy(2 σ, standard deviation)- to laser beam- to the housing ± 0.3°± 0.3°Horizontal measurementAvailableIndirect ... , for distances above 30 mto ± 0.1 mm/m. automatic self-leveling laser