Main Technical Parameters: Available wavelength: 635nm ; 650nm ; 670nm Operating voltage: DC 5V Beam diameter:≤1mm Divergence: 0.3 to 1.5mrad Output power: 1-7mW(635nm) ; 1-40mW(650nm) ; 1-4mW(670nm) Port: T T L 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-4 power supply