Features: Shows Optics Concepts: Use the observation box to present light interference and diffraction in a hands on format that helps learners relate theory to guided practical observation. Integrated Box Design: The observation box keeps the main teaching components together and reduces setup steps, making repeated classroom preparation simpler for teachers and learners. Complete Set For Basic Practice: This set includes the observation box, viewing screen, and optical experiment cards so users can start foundational optics demonstrations with coordinated parts. Works Across Learning Settings: Use it for classroom demonstrations, physics exploration, science club activities, home science practice, or display based physics instruction. Flexible Light Source Use: Pair the set with a phone flashlight or another suitable light source for basic comparison experiments and adapt the demonstration to different lesson or study needs. Specifications: Component: Plastics Viewing Screen Size: Approx.13.50x8cm/5.31x3.15inch Light Source Box Size: Approx.7.80x5.20x6cm/3.07x2.05x2.36inch Quantity: 1 Set Package Includes: 1 set Optics Observation Box note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.