Main Technical Parameters: Available wavelength:635nm ; 650nm ; 670nm Operating voltage: DC2.7V to 6V Beam diameter: minimum beam diameter ≤1mm Divergence: 0.1 to 1.5mrad Output power: 1 to 40mW 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