Main Technical Parameters: Available wavelength: 635nm ; 650nm ; 670nm Operating voltage: DC2.7V to 6V Divergence: 0.3 to 1.5mrad Line thickness: ≤0.5mm (0.5m) ; ≤1mm (3m) ; ≤1.5mm (6m) Camber: ≤1mm@6m Fan angle :10 to 110 degtree Optics:glass lens Operating temperature:?0 celsius to +40 celsius Storage temperature: ?0 celsius to+80 celsius Accessories choose and buy : LPS-1 , LPS-5 , LPS-6 power supply ; Bracket