Choice of achromat, super high contrast, or plan optics Inward-facing quadruple revolving nosepiece Variable 3W LED illumination Built-in low-drive mechanical stage with extended post for X and Y control (135 x 140 mm) 18 mm eyepieces 30° inclined ergonomic Siedentopf viewing head Built-in internal 110V to 220 V auto-switching power supply