Objective lens: 4X 10X 40X 100X Eyepiece: Wide-angle eyepiece: WF10 WF16 (WF20 WF25X optional) Observation head: Binocular Stage: double-layer mechanical platform, optional single-layer moving ruler platform Focus: Coaxial two-wheel handwheel coarse adjustment fine adjustment Condensed light: five-color optical cable Power supply: 220v-100v AC input LED light source, upper and lower light sources can be installed with batteries