Yes it does... if you live in America. If you live in the rest of the world: tough luck, you're limited to 2.4 Ghz! This is a bit of an odd decision from Google (aka Nest), but only half of Nest's products support 5 Ghz so it's not exclusive to the Hello. This compares to the Ring series whose Doorbell 1 and 2 does not support 5 Ghz, but their Pro (the nearest Nest Hello competitor) which does support 5 Ghz. In terms of whether to use 2.4 Ghz or 5 Ghz if you live in America, you can test both out but it's worth noting that 5 Ghz WiFi signals do not penetrate solid walls as well. So if you have concrete or brick walls between your Hello and your internet router, you might be better off with 2.4 Ghz. You can change the setting fairly easily at the bottom of the Settings pane, so it's worth quickly testing both options. You might find that you have higher download and upload speeds with 5 Ghz, even with a weaker signal.