***** **********Best Quality Guranteed. *****High Magnification Science built-in WF10x & WF25x eyepiece and optical lens: 4x, 10x, 40x, rotatable monocular head offers six magnification levels at 40x, 100x, 250x, 400x and 1000x. High Quality Optics can give children improved visual quality and sharp image when in use*****Dual Light LED Illumination Double light compound has incident and transmitted LED light sources, which can see both opaque objects illuminated from above and translucent specimens illuminated from below. the bottom LED light can be adjusting light by rotrating the wheel as you needed, easy to use. (Not including batteries) *****Easy to Focus & 6 Colorful Filters Built-in 6 different colors filters rotating wheel saves you from having to stain slides. The is easy to focus, just need to rotate the focus knob slowly so that you can see clear images*****Professional Design & High-Class Material38inclined ocular tube with 360degree rotatable monocular head reduces eye and n