Item is a brown handheld electronic stereoscopic viewer manufactured by Kodak. Lenses adjustment and focus are controlled by a small brown knob on the right and switch on the top of eye lenses.
This 3D viewer was used to view two nearly identical photographs, or stereographs, as one three dimensional image. The stereograph would be placed in the cardholder and adjusted to fit the user's vision until the two images overlap to mimic a three-dimensional effect. Typically, this object would take transparencies from reels or cards. The light within the object would illuminate the back of the transparency to heighten the experience.