Specification: Package 1: 40X-640X (40X 64X 100X 160X 400X 640X) 1 xMicroscope host 1 x185 objective lens: 4x, 10x, 40xS 1 x WF10X eyepiece 1 x WF16X eyepiece 1 x 3 eye LED light (Without battery) 1 x mobile phone stand 1x 5PCS glass slide specimens Package 2: 40X-1280X (40X 64X 100X 128X 160X 200X 320X 400X 640X 800X 1280X) 1 xMicroscope host 1 x185 objective lens: 4x, 10x, 40xS 1 x WF10 eyepiece 1 x WF16 eyepiece 1 x 2X multiplier 1 x 3 eye LED light (Without battery) 1 x mobile phone stand 1x 5PCS glass slide specimens Package 3: 40X-2000X (40X 64X 100X 128X 160X 200X 250X 320X 400X 500X 640X 800X 1000X 1280X 2000X) 1 xMicroscope host 1 x185 objective lens: 4x, 10x, 40xS 1 x WF10X eyepiece 1 x WF16X eyepiece 1 x WF25X eyepiece 1 x 2X multiplier 1 x 3 eye LED light (Without battery) 1 x mobile phone stand 1x 5PCS glass slide specimens Package 4: 40X-640X（Electronic multiples 200X-2000X） 1 xMicroscope host 1 x185 objective lens: 4x, 10x, 40xS 1 x WF10X eyepiece 1 x WF16X eyepiece 1 x 3 eye LED light (Without battery) 1 x mobile phone stand 1x 5PCS glass slide specimens 1x 1.3MP electronic eyepiece (electronic multiple of 50X) For Windows system Package Included: microscope*1set If you have any questions about the product, please contact me, we will contact you within 24 hours and give you a satisfactory answer. The Interpupillary Distance is Between 50-75mm.