This beginner microscope is constructed of an all metal frame for durability and built to handle years of use. Unique light gathering system uses a prism and can be used in any daylight places. Take this portable microscope with you to explore minerals, stones, insects, flowers, pond water and slides. Focus your specimens by moving the optical tube up and down. Suitable for grades K to 6. Comes with a 5 year limited warranty, excluding bulbs.