Movement of optical tubes: Horizontal:adduction + 50deg Abduction - 40 deg Vertical:hyper 30 deg Hypo 30 deg Torsional:incyclo 20 deg Excyclo 20 deg Slide illumination:- By rheostat controlled 6v lamp for each slide. After image illumination by 6v lamp Auto flashing:- Auto flashing of slide illumination either simultaneously or alternatively in rapid & variable modes Mode & mode selection: Five modes of slide illumination namely normal, flashing right, flashing left, flashing r+ l & auto flashing can be selected by a single selector knob. Dimensions:- Longitudinal: 30.3 cms Lateral: 25.5 cms Vertical: 36.5 cms Weight: 20 kgs Power supply: 220 v ac / 110v Standard accessories:- A set of slides containing 9 pairs, one power cord, one dust cover, spare 6v bulbs (2 nos) Optional accessories:- Instrument table: manual or motorized Haidinger brush attachment.