Thank you for posting on our forums website! Sorry to hear that you are not receiving a good video quality when connecting to your Slingbox PRO-HD. The network speed can varie due to a limited amount of reasons. The network speed could fluctuate due to how many devices are on your internal network, bottlenecks in the network connection to the server, and many more.
This article below will explain more about what could be causing the issue you are experiencing.
If you have any other concerns about this issue, feel free to contact us back or call in at 1-877-467-5464. We are open seven days a week, 10:00am to 10:00pm EST.
The Sling Media Moderation Team