Features: 1. Telescope mobile phone clip: It has a mobile phone card slot and a telescope eyepiece retaining ring, which is used to install the mobile phone on the telescope, which is convenient for shooting. 2. Adjustable size: With a rotating snap ring, the adjustable size range is between 25-45 mm, and the horizontal adjustment knob can adjust the width of the mobile phone card slot. 3. Universal type: Most mobile phone models can be used, and the collar can be adapted to most bird watching glasses, microscopes and telescopes. 4. Easy to install: Fix the phone on the phone clip, adjust the phone lens to the center of the light hole, and then adjust the collar to fit the size of the eyepiece. 5. Adjustment method of the collar: Rotate the collar knob counterclockwise to increase the inner diameter of the collar, and rotate the collar knob clockwise to reduce the inner diameter of the collar. Specification: Product name:Cellphone Telescope Adapter Mount Color: Black Material: Plastic Size: About Telescope phone clip: 12.5*7.5*4.5 cm/4.92*2.95*1.77 inch (L*W*H), Snap Ring Knob: 25-45 mm/0.98-1.77 inch (adjustable inside diameter) Applicable eyepieces: 26-47 mm/1.02-1.85 inch (outer diameter) Applicable mobile phone: 53-97 mm/2.09-3.82 inch (W) The package includes: 1Pc x Cellphone Telescope Adapter Mount Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement. 3. When using the slot knob, do not use excessive force to avoid damaging the button. 4. Some mobile phones will encounter the problem of button blocking during installation and use. You can place the buttons outside the bracket to adjust the position of the handle to align the mobile phone lens.