Fire TV box already
did 4K, but this one can now play it at 60 frames per second and adds HDR (high dynamic range) as a brand new feature to Amazon's streaming devices. ... Amazon has chosen to
supportHDR10 but not Dolby Vision for HDR playback. On the audio side, the device offers Dolby Atmos integration.27 Sep 2017
Is the fire stick 4k compatible?4K Resolution. If you have a 4K TV, the Fire TV will help you get the most out of it. This device supports a variety of apps in full UHD resolution, including heavy hitters likeAmazon Video, Netflix and YouTube. The Fire TV Stick, on the other hand, caps out at a full HD resolution of 1080p.27 Sep 2017Amazon Fire TV vs Fire TV Stick: What Should You Buy? - Tom's Guide
What makes 4k so special?A: 4K, also known as Ultra HD, refers to a resolution of 3,840 x 2,160 pixels. That's four times the 1,920 x 1,080 pixels found in your full HD TV.13 Sep 2017..
plus you could go to this link to help you out more.
Does Fire Stick Support 4K Google Search