PLEASE INSTALL REMOTE SERVER (SEE INSTRUCTIONS BELOW).Presentation Remote on your smartphone with additional Presentation TIMER. Works over Bluetooth or Wi-Fi. Works with MOST programs (PowerPoint, Prezi, Adobe Reader, Google Slides, OpenOffice/LibreOffice). You have to install a remote server on your PC: * http://goo.gl/XPwZa (Windows 8, Windows 7, Windows Vista or Windows XP SP3)If you have any questions please email me at support@kondrikov.com