Specification of the Microscope Material: plastic body Working Stage: working stage with slide clips Coarse Focusing llumination: LED illuminated Batteries Needed: 3 x AA batteries (NOT included) Suitable for: primary and secondary school students Package Included 1x WF10X eyepiece 1x WF20X eyepiece 1x 2X relay Lens 1x microscope main body with 4X 10X 40X objective 1x smartphone adapter 1 set of biological accessories Attention The cellphone and batteries are NOT included. NOTE This microscope only can be used with 3 pieces AA batteries (NOT included), it can't be used with a power adapter. If you mind, please buy it with caution, thanks. Microscopes with solid metal frame and coarse/fine focusing knobs, ensures detail and precise focus adjustment, crate a image more clearer and sharper. Top and bottom LED simultaneously brightfield, provide high-resolution color-corrected images.Meet all your observation need. This microscope is designed to help students/kids/adults/beginner/amateur scientist/hobbyists exploring the fantastic world of the life. It is ideal for school, laboratory or home teaching, one-on-one instruction.