This is an adapter so that any lyre can be attached to any phone or tablet case. the Lyre can be inserted into the adapter in 2 ways to allow both horizontal and vertical scrolling of the sheet music. It can be easily glued to any existing case. I printed mine in TPU I have also included a Samsung note 10 plus in with the models. As an example of how to add it. This adapter can be printed as is, then glued to another case, or the stl file can be added to an existing phone case model that you have already. it also has a nut slot so that it can be attached to a tripod. The Lyre can easily be removed to use with regular music paper. please see the photos to see how easily it is added and removed from the case. Please like my models. if you able, please donate.