What is the link caliber of the mobile phone bracket and the mobile phone clip?

According to relevant public information, the microscope mobile phone clamp fixing clamp is connected to the 22mm interface of the mobile phone photography bracket. Accord to that display of public information related to the query,

1. Erect the movable small plate on the back of the bracket upward.

2. Then open the front cover and you can see the card slot on it.

3. The groove is used to fix the angle of the cover plate. When the movable small plate is jacked up, it can be clamped into the groove to fix the cover plate. You can adjust the tilt of the phone according to the slot.

4. After fixing the cover, stand up the bracket, and you can put the mobile phone on it.

5. Put this card-shaped bracket vertically, as shown below. Now you can put the mobile phone horizontally.