【Multi-function Compatibility】This is a high-definition mobile phone direct-connected handheld digital microscope. When used, the product is directly connected to the mobile phone interface and supports mobile Android (with OTG) or iOS devices. It is more comfortable and faster to use. 【50X-1600X Digital Magnification】50x to 1600x magnification allows you to clearly view the smallest details of your specimen. The optimal focal length of the microscope is 0-90mm. The focusing wheel is only used for focusing. Different object distances correspond to different magnifications. You need to adjust the focus by adjusting the focusing wheel to see the object clearly. Note: Please remove the plastic protective cover before use!