Universal Fit — 33 to 60 mm Eyepieces Works with most brands' spotting scopes, binoculars, and monoculars. Compatible with Most Phones Securely holds a wide range of smartphones for stunning digiscoping. Compact & Lightweight Design Made of durable ABS plastic and sized just 151 × 84 × 44 mm. Quick & Reliable Setup Easily clips onto your eyepiece; secures your phone for steady photo and video capture. No Additinal Accessories Required! Capture Nature with Ease Perfect for recording wildlife, birdwatching, or outdoor adventures directly through your optic.