This is not functional and there are no moving parts. Dimensions: 3/16"W x 13/16"H x 5/16"D. Manufacturered by Aztec Imports Inc.. 1" to 1'. 1:12 Scale. This is sized for a dollhouse. Detailed scale model for adult collectors. Not intended for children under 14. This all-metal microscope will add a nice touch to a laboratory or child's miniature scene.