Chromecast is a digital media player developed by Google. The device, a 2.83-inch HDMI dongle, plays audio/video content on a high-definition display by directly streaming it via Wi-Fi from the Internet or a local network. Users select the media to play using mobile apps and web apps that support the Google Cast technology. Alternatively, content can be mirrored from the Google Chrome web browser running on a personal computer, as well as from the screen of some Android devices. Chromecast was announced on July 24, 2013, and made available for purchase on the same day in the United States for US$35, along with a limited-time promotion for three free months of Netflix. The Google Cast SDK was released on February 3, 2014, allowing third parties to modify their software to work with Chromecast.