On your computer:
Add the Presentation Remote app from the Chrome Web Store to the browser or visit presentationdocs.com on Chrome or Safari.
Click the "Connect" button in the left menu and a QR code will show up.
On your mobile device:
Install "de Mobo" on Android 2.3+ or iPhone 4+.
Click "Create Connection" on your mobile device to scan that QR code.
Make sure the mobile device and computer are using the same wifi network for reliable performance.
Watch the video below to see Presentation Remote in action