The Stereoscope is made to fit the Iphone 4S, you begin a slide show on one of the photo groups or the larger group and slide your Iphone into a slot in the side. Note - the viewer does not come with an Iphone (d'uh)
The Stereoscope Viewer is a very usable example of Steampunk craftsmanship. It is made of wood with brass trim, and is signed and dated by Will Rockwell.
*sigh* I'm a little frustrated right now because several reviews on the Internet describe this viewer as "rusty". There is no rust or simulated rust on the device.
Have any questions? Contact the shop owner.