This is a great design for those needing versatility from their microscope. The M3-M features a monocular head, 18mm W10XD eyepiece, built in NA 0.65 condenser with iris and a cordless LED illumination system. But what makes this a great unit it that it is both a compound and a stereo microscope that can be used in the laboratory and in the field. The three compound objectives are 4X, 10XD and 40XRD. By moving the stage down the microscope becomes a stereo microscope via its 1x macro objective (total 10x magnification with the eyepiece). The cordless design means you can travel to the field with this scope and have over 40 hours of use until it needs to be recharged. This really is a great microscope.