Here is a handy smartphone/tablet mount that lets you use your smartphone over any desk or table. The Kolasels Smartphone Arm Desk Mount can accommodate devices from 4 to 12.6″. You can easily adjustable the angle.
You can position the arm where you want or fold it out of your way easily. It can be stretched from 4.5 to 9.84″ inches. You can find out more about it here.[where to get it]