STORAGE AND SHARE YOUR ADVENTURES - Turn your cell phone into a SUPER powerful camera and camcorder to capture the best moments. UNIVERSAL - The mobile phone adapter is perfect for all types of binoculars, monoscopes, telescopes with an eyepiece diameter between 2.5 and 4.5 cm. Simply attach the adapter to the eyecup of your optical device! Compatible with iPhone, Samsung Galaxy Note, Sony, LG, HTC and many other brands. Service always guaranteed if it does not match the size of your phone. SUPER EASY TO USE - STABLE AND SAFE - We have improved the design and functionality of the phone adapter for an easy and secure grip, both when paired with your phone and your equipment optical. We also reinforced the phone holder with an aluminum plate and a double layer of cotton to improve its durability. EXTENSIBLE WIDTH - From 5.5 to 9.8 cm. Adjust the length of the holder to suit your phone and screw it in until it is secure