Slingbox does not require a monthly fee or subscription for its basic functionality. Once a user purchases a Slingbox device, they can set it up and use it to stream their television content from a cable or satellite provider without incurring ongoing charges. The Slingbox allows the user to access their live and recorded TV shows remotely, as long as they have an internet connection. However, it is important to note that users may still be responsible for any fees associated with their cable or satellite service provider, as Slingbox simply acts as a bridge for streaming that content. Additionally, users should check the latest information available on the Slingbox website, as there may be updates or changes to their policies.