The Laser Module by Unilab is a new innovative solution developed by our in-house NPD team for conducting a number of laser light experiments as part of the GCSE and A-Level Physics curriculum including the diffraction of light. Each laser module has a Power Rating of less than 1mW making them a Class 2 Laser suitable for use in the school laboratory. The Laser Modules can be placed on a desk or flat surface with a white screen 1M in front. When switched on the laser pointer is projected onto the screen. A diffraction grating can then be used to split the beam of light.The Laser Module is available in 4 variations each sold separately: Red Laser (Wavelength: 650nm) Green Laser (Wavelength: 520nm)Blue Laser (Wavelength: 450nm)Dual Laser (Red & Green)Each unit comprises of a different coloured laser inside a stable plastic housing. There is a slide carrier on the front of each Laser box to accommodate a standard 50mm x 50mm Diffraction Grating - available to purchase separately. Supply Voltage: 4.5V DC (3 x AA batteries - not included)Students should be no closer than 1M from a Laser Experiment.Please follow all local regulations governing the use of lasers in educational establishments.