Slit Lamp Adaptor Digital Camera CCD Adaptors Smart Phone Adapter 1. Adjustable support case dimension makes it available for the most mainstream smart-phones. The sizes of the smart-phones can be from 4” to 5.5”. 2. Ultra-durable Polycarbonate plastic. 3. Fast Installation, Easy Operation 4. Send out high-res images directly from your phone via email, SMS, twitter or 3rd party apps. 5. It is designed to work with eyepieces that are 1in – 1.8in in diameter (25mm – 45mm). 6. Silicon sizing bands are included in the case to fit for the smaller diameter eye-pieces.  7. Work with Slit Lamp, Microscopes, Telescopes, Binoculars, Spotting scopes and other Optical Instruments.