The title says it. Some Wi-Fi screen caster devices look like and work like the the
Chrome Cast device. On eBay you will find Chrome cast sling for almost $10 less than the regular retail price.
But avoid the even cheaper dongles if you want Netflix or Amazon videos.
The low cost vendors have a disclaimer at the bottom of a long, long listing.
Here is one that does Netflix.
Anycast Chromecast Digital HDMI Streamer HD Media Air Play TV Miracast Dongle
But be careful about some of the other.s Of course, maybe you would rather have a
Roku instead. A refurbished Roku goes for about $20 on eBay. The Roku does most of what the Comcast does. But it is different.
Anyway, the point of this is that some of the off 'brand devices do not do Netflix because of security protocol in Netflix streams.