Thanks for posting to the forums!
To connect to your Slingbox PRO-HD from your iPad Air, you will need to download the SlingPlayer for iPad application from the iTunes App Store.
Once the SlingPlayer application is installed, you will be prompted to enter your Slingbox account credentials and configure a few settings. As soon as the SlingPlayer app is setup, you'll be able to begin streaming from your Slingbox!
Hope this helps!!!
Sling Media Moderation Team