SVBONY Universal Adapter Mount Binoculars Monocular Spotting Scope Telescope Phone Support Eyepiece D: 25-48mm for Astronomy Telescope Main Features: 1.100% Brand New and Never Used. 2.Aluminum alloy shell, strong and sturdy. 3.Light as a swallow, net weight is only 106g/3.73oz 4.Get Your Mobile Phone into Video Camera and Image Captured in Distant, Tiny World. 5.The contact surfaces to connect phone is covered by soft material, keep your device from scratch and damage. 6.Super large width range: 55mm-100mm 7.Fit for eyepiece diameter: 25mm-48mm 8.Can be applied in microscope, telescope, and binocular, monocular, night vision spotting scope. Note:There is only a adapter in the parcel,no phone ,no monocular .If you want them pls contact me.Thanks. Aluminum alloy shell, strong and sturdy. The contact surfaces to connect phone is covered by soft material, keep your device from scratch and damage. Fit for eyepiece diameter: 25mm-48mm Light as a swallow, net weight is only 106g/3.73oz How to use it? Step1: Makesure your telescope eyepiece is clearly and the diameter between 25 mm - 48 mm. Makesure your cell phone camrea is clearly and the large width range between 52 mm - 100 mm Step2: Connect the telescope and adjust fixd eyepiece until the telescope is not shaking Step3: Put the cell phone on adapter and adjust the angle of cell phone camera to the eyepiece of telescope directly. Step4: Fixd cell phone until the cell phone is not shaking. Taking photos.