The AT&T DirecTV Android TV Wireless 4K OTT Client player C71KW-400 is a set-top box that allows users to stream content in 4K resolution. With a quad-core processor and 16GB of storage capacity, this device provides a seamless and high-quality viewing experience. Running on the Android operating system, this player offers access to a wide range of streaming services and apps, making it a versatile entertainment solution for consumers looking to enhance their TV viewing experience.