If you are looking for a solution to control the PowerPoint presentation on your computer from an external device, consider installing iClickr. This application runs both on Windows and Apple computers and is easy to install.
To install, download the application to your computer and then install the iClickr application for your phone (iPhone, Android etc). Works best when run over a wireless network and only requires the two devices be connected to the same wireless network.
iClickr lite is a free version with limitations of the maximum number of PowerPoint slides per presentation and without the facility to show presenter’s notes etc.
Complete control of your PowerPoint presentation including animations
View your slides and slide notes directly on your phone during presentation
Navigate through your slides with finger swipes and taps
Grab your audience’s attention with realtime annotations (Windows only)
Help you track your presentation time with onboard clock
Set presentation alarm so that your phone will alert you with a silent buzz before your time runs out
Pause and resume presentations
Switch between multiple slideshows
Work with both Windows and Mac Office, iWork ’09 Keynote on Mac and OpenOffice on Windows
Easy to set up with zero configuration
No additional cost when using with multiple host computers
On Windows, support all versions of Microsoft PowerPoint from Office XP to the latest Office 2010
On Mac OS X, Office Max 2004, 2008, 2011 or iWork ’09 Keynote is required
WiFi connection between the host PC and your phone is required
Also support the FREE OpenOffice 3.1 on Windows