1. [Wide Range of Applications] - The smartphone adapter holder is suitable for eyepieces with 28mm - 47mm outer diameter and can be mounted on binoculars, monoculars, astronomical telescopes, bird watching binoculars and microscope eyepieces. 2. [Suitable for Most Smart Phones] - Universal mobile phone adapter bracket with a large width range: 54mm - 90mm, fitting for more than 98% of mobile phone brand models! Commonly used other smartphones. 3. [Designed for outdoor activities enthusiasts] - The cell phone adapter mount telescope is often used for bird watching, wildlife watching, flowers viewing, whale watching, stargazing, photography, matches as well as observing astronomical phenomena. 4. [Comfortable Design] - The surface of the phone and eyepieces are covered with soft EVA material. It keeps your equipment from scratches or damage and makes it more stable. The tripod can be connected to the screw port of the phone adapter.