Sokkia PS4A style Pocket Stereoscopes 

Model NO.: PS01

Pocket Stereoscope is used for viewing 3D digital maps / images. 

Magnification 4X, Retracted Dimensions: 135mm*70mm*10mm, Extended Dimensions:  235mm*67mm*110mm, Interpupillary Distance: 55~75mm, Comes with nylon Bag.