Physics Geometrical Optics Experiment Kit Light Reflection and Refraction Educational Tools Lens Prism for Students Teacher _x000D_ Specifications Material: acrylic Package Size:24cm*14cm*2.6cm(9.45*5.51*1.02 inches) Batteries Needed: 2 pieces AAA batteries (NOT included for safety) Suitable for:Teacher/junior high school students Optical Experiments:refraction of light, convex lens refraction, lens refraction, prismatic refraction, plane mirror reflection, diffuse reflection, convex mirror reflection, concave mirror reflection, etc. Package Including 1x Biconvex Lens1, 1x Biconvex Lens2, 1x Biconvex Lens3, 1x Single Concave Lens, 1x Acrylic Glass Tile, 1x Single Convex Lens, 1x Double Concave Lens, 1x Triangular Prism, 1x Three Way Linear Light Source, 1x Multifunctional Reflector 1x Color box 1x English Color page manual Note: 1. Due to differences in monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture, such as the color of the switch. 2. Due to manual measurement, please allow 1-2 cm measurement deviation. 3.Three Way Linear Light Source can be adjusted by using a screwdriver to adjust the direction of light. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Notes: _x000D_ Due to the light and screen setting difference, the item's color may be slightly different from the pictures. _x000D_ Please allow slight dimension difference due to different manual measurement. _x000D_ All our products are shipped without batteries! _x000D_ _x000D_ The color of some accessories is different from the product picture, but it will not affect the use, I wish you a happy shopping! _x000D_ _x000D_ _x000D_ _x000D_