The Chromecast Ultra connects to 802.11ac 2.4GHz and 5GHz Wi-Fi, just like the regular Chromecast, but also has a 2×1 MISO (Multi Input Single Output) antenna for faster network speeds and low latency. It also comes standard with an ethernet port built into the power supply, which can be important for maintaining 4K streams or bringing the Chromecast to tough Wi-Fi areas like basements, backyards, and far-flung corners of the house. You can buy a $13 ethernet adapter for the regular Chromecast if you need that particular feature, but at that point, you might as well get a Chromecast Ultra instead.Even if you don’t watch a ton of 4K HDR content now, if you have a 4K TV and expect to stream in 4K soon it’s probably worth spending the extra money on a Chromecast Ultra. It’s faster and still more capable than the regular Chromecast, despite being a couple years old. And the included Ethernet adapter means you’ll never have to buy an extra accessory for your Chromecast to get it online.