The Nexus Player is a Google's own-branded Android TV device announced in October 2014 alongside the Nexus 6, Nexus 9 and Android 5.0 Lollipop. The Player was the consumer launch device for the Android TV platform, following up the developer-only ADT-1 box that was shown off at Google I/O 2014.
Design-wise, it's a flattened out, circular black box that connects to your TV over HDMI and works for watching media, Google Casting content and games with an optional $39 game controller.
It's running a 1.8GHz Intel Atom CPU with a PowerVR GPU, along with 1GB of RAM and 8GB of storage. It connects to your home network over Wifi, and the basic remote connects to the box over Bluetooth.
Though it does support USB OTG for external storage over the single MicroUSB port, the Nexus Player is somewhat limited due to its small amount of internal storage. Some have also complained because it doesn't have an ethernet port, instead relying on Wifi for the its Internet connection.
The Nexus Player launched at $99 on the Google Play Store, and though initial stock was limited it expanded to other retailers in due time.