The AT&T DIRECTV Stream C71KW-400 Media Boxes Lot of 3 offers high-quality media streaming capabilities with Dolby Audio support. These black boxes feature various connectivity options such as HDMI, Ethernet, and USB ports. Perfect for enhancing your TV viewing experience, these media boxes provide digital audio output through Optical TOSLINK and HDMI connections. Enjoy immersive Dolby Audio surround sound and access to a wide range of entertainment content with this product line from AT&T. Ideal for home entertainment systems, these media boxes are a great addition to your tech setup.