"Our product portfolio continues to evolve, and now we have a variety of products for users to enjoy audio. We have therefore stopped manufacturing our Chromecast Audio products. We will continue to offer assistance for Chromecast Audio devices, so users can continue to enjoy their music, podcasts and more."
The Chromecast Audio is a dongle that you can plug into to your speaker to add Wi-Fi connection and the ability to stream audio -- essentially turning your non-connected speaker into a "smart" speaker. It looks and works a lot like the standard, except it connects via auxiliary cord instead of HDMI and only streams audio.
The device was first announced in 2015. Since then, Google has released various smart speakers including the, , and .
You can currently Google's website for $15 (or £30/AU$59). But since the device is discontinued, it may be gone for good once stock runs out.from