The Nebula brand under Anker may not be a household name, but it is a current Anker product lineup that consists primarily of portable projectors. However, the brand has now expanded to include a 4K TV device called the Nebula 4K Streaming Dongle for $89.99 and seems to have added it to the lineup without much marketing.
Overall the device itself seems like a decent performer as it runs vanilla Android TV with 2GB of RAM and 8GB of storage, but that doesn't do it much justice once compared to other 4K Android TV boxes for price. It operates with the standard power via USB with HDMI for video output and offers no unique ports, like ethernet, to justify the higher price. The remote is moderately improved compared to many other TV boxes, so there are at least some perks, but overall it is just a slight improvement over a standard Android TV remote.
On top of the other price to performance issues, the Nebula 4K Dongle only offers Bluetooth 5 and basic HDR out of the box. Coming from a brand that found success in the high value per dollar electronics market, this is an odd move.