Once installed, this Premium Key unlocks the premium features of the free PrinterShare Mobile Print application.However, please note that it cannot be used on its own! One needs to install the main free PrinterShare Mobile Print app in order to print.PrinterShare Mobile Print app supports a wide variety of HP (Officejet, LaserJet, Photosmart, Deskjet and other models including HP Officejet 100/150/200/250 Mobile series and HP Officejet H470), Epson (Artisan, WorkForce, Stylus and other series), Canon (PIXMA MP/MX/MG and other series), Brother, Kodak, Samsung, Dell, Ricoh, Lexmark, Kyocera, OKI and other printers including legacy networkable. A full list of supported printers available at http://printershare.com/help-mobile-supported.sdf. You can also print to unsupported and legacy printers with our free computer software for Mac and Windows available at http://printershare.com.Here is the list of printers supported by PrinterShare app:http://www.printershare.com/help-mobile-supported.sdfMake sure that your printer is supported. Also, please print a test page before purchasing this Premium Key.With PrinterShare you can instantly print Office documents, bills and invoices (Word, Excel, PowerPoint, PDF, text files and more) directly from your tablet or phone (from internal memory, SD card or cloud source such as Google Drive / Google Docs) to a printer right next to you or anywhere in the world!Premium Features:* Unlimited Nearby direct printing via Wi-Fi, Bluetooth and USB without PC;* Unlimited Remote printing. The receiving end (Windows or Mac) would not have to buy pages or subscribe;Have a good print!