My First Lab Microscope is a great scientific instrument recommended for ages 11 and up. Suggestion: We suggest purchase of "Microscope Accessory Kit" along with the microscope. It contains supplies and basic instructions for preparing your own slides for observation. Features: Real optical glass lenses Wide-field eyepiece with pointer (10X) Inclined, 360-degree rotating head provides more comfort and ease of use Revolving nosepiece with click stops keeps your specimen centered while changing magnification Three achromatic objective lenses ( 4X, 10X, 40X ) Magnification power 40X, 100X and 400X Built in 15W illumination Sturdy all metal construction UL & CSA approved 3-wire power cord One year manufacturer limited warranty Overall size 4.5" x 6" x 11" Weight 3.5 lbs Includes: Dust cover Five prepared glass slides User's manual For online user's manual click this link | User's Manual | For suggestions to make prepared slides and some ideas for observation click on this link - Suggestions & Ideas