Zoom objective ratio 0.6x to 4x or 1x to 5x.Coated lens eyepieces SWF 10x of 30mm dia, both eyepiece tube with diopter adjustment and rubber eyeguards, 360° rotatable head. Fine focus by rack and pinion motion, adjustable head in height on pole stand. Round glass stage changeable with white Perspex stage plate. Incident and transmitted light 6V bulb solid state variable control, input 220VAC. Plywood case packing instruction manual, dust cover. Optional : SWF 15x, SWF20x eyepieces.