Eyepiece bayonet: Internal diameter is between 22.5-48mm Rubber sucker: Connected with mobile device Lock catch: Rotate clockwise to narrow eyepiece bayonet, or rotate counterclockwise to expand; push up to fix eyepiece bayonet Fine adjustment screw: Loosen to adjust eyepiece bayonet INTRODUCTION (1) Name: Mobile device holder (2) Model: CM-9 (3) Application: Connect mobile device to telescopes to take photos (4) Eyepiece bayonet connection: Compatible with telescopes whose eyepiece outer diameter is between 22.5-48mm, suitable for mobile phones with a width of 52-100mm (5) Rubber sucker connection: Compatible with mobile devices that have camera or video function, such as smartphones and tablet computers Note (1) Use the touch screen camera function to take photos if available on your mobile device. (2) Use the center focus function to take photos if available on your mobile device. (3) Keep away from fire and heat. (4) If the rubber sucker is stained with dust, rinse it with water for reuse. (5) Do not scratch the rubber sucker with sharp objects, as it may affect its service life. Material: Plastic Color: Black Package Contents: 1 x Telescope Clamp Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual item. The measurement allowed error is +/- 1-3cm.