This device demonstrates the generation, propagation, reflection,
interference, and diffraction of waves. It comes with all accessories necessary for these experiments. A 6V DC power source and an overhead projector are required (not included). Includes activity guide. Additional Info: This device demonstrates the generation, propagation, reflection, interference, and diffraction of waves. It comes with all accessories. A 6v dc power source and an overhead projector are required (not included). Includes activity guide. Package Size(L x W x H): 15.5 X 12 X 4 (IN) Categories: Waves, Tuning Forks HTS Code: 9023.00.0000 UNSPSC: 6.01048e+007 Country Of Origin: CHINA