sentences:  Therefore, both boxes include HDTV capability, though the ATSC digital tuner that was included in the PRO-HD was not included in either Slingbox.The Slingbox 350 is the base product, with one SD/HD audio-video input (composite or component) and an ethernet port to connect to the Internet.The Slingbox 500 was positioned as a platform for next-generation Smart TV capabilities.