laser level

Includes:
1) 400mm sturdy aluminum box section spirit level with two acrylic vials:
a) Spirit accuracy: 0.5/mm/m
b) A strong magnet built in
2) Specifications:
a) Wavelength: 650nm
b) Working distance: 50m
c) Visibility: 150m
d) 15m circle of light
e) φ8 x 10mm
3) Output:=<1MW/3MW
4) Power: 2 x AAA batteries
5) System horizontal precision: 0.029 = 0.5/1000