This overlay can be printed out and used with any of the Mobi's....The idea of having an overlay you can print out is that it allows one to make notes on it you may want to keep handy I am the authorized K-12 representative in South Carolina for eInstruction by Turning Technologies Bill McIntosh SchoolVision Inc.. Authorized South Carolina K-12 Consultant for eInstruction by Turning Technologies Phone :843-442-8888 Email :WKMcIntosh@Comcast.net Twitter : @OtisTMcIntosh SchoolVision Website on Facebook: https://www.facebook.com/WKMIII Website : www.einstruction.com Stay Connected - @eInstruction • Facebook Turning Technologies | 255 West Federal Street | Youngstown, OH Main: 330-746-3015 | Toll Free: 866-746-3015 | Fax: 330-884-6065 www.TurningTechnologies.com