With CE approval/7 inch LCD and touch screen keyboard/functionality of Quantitative, Spectrum, Kinetics, and Photometric programs Light source: Tungsten halogen and deuterium lamp with Silicon Photodiode detector Measuring range in the range of 190 to 1100 nm wide Band < 1.8 nm Display bandwidth < 0.1 nm Bandwidth accuracy < ± 0.5 nm with special software to connect to a computer to check, monitor and store information.