Viewing Head: monocular vertical tube. Working Stage: working stage with slide clips. llumination: LED illuminated. Batteries Needed: 3 x AA batteries . Suitable for: primary and secondary school students. Eyepiece: WF10X and WF20X Objective: achromatic 4X, 10X and 40X Relay Lens: 2X Optical Magnification: 40X, 100X, 400X, 80X, 200X, 800X, 160X, 400X, 1600X Package Included 1x WF10X eyepiece 1x WF20X eyepiece 1x 2X relay Lens 1x microscope main body with 4X 10X 40X objective 1x smart adapter 1 set of biological accessories Attention The cell and batteries are NOT included. The style of cell adapter will be shipped at random. watch repair, soldering, scientific experiments, education, etc. Both adults, elderly and can easily use it. Also this USB microscope can be a gift for fathers, boyfriends.