This is a cell phone adapter mount, perfect for binoculars, monoculars and spotting scopes eyepiece outer diameter between 26.4mm-46.4mm. The centre of phone camera and the optics can automatically be aligned. Features - Color: Black. - Material: Plastic. - Size: 12.2 x 3.3cm. - Fit almost all brands of smartphones on the market with or without a case from small to large. - Perfect for , monocular, spotting scope the outer diameter of which from 26.4mm-46.4mm. Please make sure that the dimension of the device is in this range. - the camera and optics in few seconds. - Lightweight and portable, you can take it out . - Easy to operate, labor-saving also. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1 x telescope phone adopter