AirPort Express Base Station (Generation 1, 2004)

The AirPort Express Base Station was part of Apple’s AirPort line of wireless products. Although its design was more compact and it had fewer features than the AirPort Extreme Base Station available at the time, the AirPort Express Base Station included the ability to receive streamed audio from a wirelessly connected computer that was running iTunes. The AirPort Express Base Station could play the streamed audio through speakers connected to its analog/digital audio output jack, a feature the AirPort Extreme lacked.

The original AirPort Express offered 802.11g wireless, contained an analog–optical audio mini-jack output, a USB port for remote printing, and one Ethernet port. The AirPort Express could only stream audio to a powered speaker or stereo system via iTunes—it could not stream video.

Source: Wikipedia

Apple TV (Generation 2, 2010)

The Apple TV Generation 2 was a major change from the original Apple TV. It was designed to stream rented movies and TV shows from Apple, and to stream movies, shows, photos, and other content from a Mac, PC, iPod, iPhone, or iPad at 720p (30 FPS). It also supported Netflix, YouTube, and Flickr using built-in apps.

The Apple TV Generation 2 used an Apple A4 processor and ran a version of iOS. Ports included HDMI, optical audio, 10/100Base-T Ethernet, and a Micro-USB port (used for service and diagnostics). It connected wirelessly using 802.11a/b/g/n Wi-Fi. Its all-black external case was 3.9 inches square and 0.9 inch tall.

The Apple TV Generation 2 shipped with the aluminum Generation 2 Apple Remote.

Source: EveryMac.com