Main Technical Parameters: Available wavelength: 635nm ; 650nm ; 670nm Operating voltage: DC2.7V to 6V Line thickness:≤0.5mm (0.5m) ;≤1.5mm (3m) ;≤2mm (6m) Verticality: ? Divergence:0.3mrad Optics:glass lens both sides AR coated Operating temperature : ?0 celsius to +40 celsius Storage temperature: ?0 celsius to +80 celsius Accessories choose and buy:LPS-1 , LPS-5 Power Supply