Video
Codec: HEVC / H.265
Resolution: Native 4K (2160p)
HDR: HDR10
Aspect ratio: 2.40:1, 1.78:1
Original aspect ratio: 2.39:1

Audio
English: DTS-HD Master Audio 5.1
French: DTS-HD Master Audio 5.1
German: DTS-HD Master Audio 5.1
Russian: Dolby Digital 5.1
Italian: Dolby Digital 5.1
 (more)
Subtitles
Mandarin (Traditional), Cantonese, English SDH, French, German, Italian, Japanese, Portuguese (more)
Discs
4K Ultra HD
Blu-ray Disc
Three-disc set (1 BD-100, 1 BD-25, 1 BD-50)
BD-Live

Packaging
Slipbox
SteelBook, Embossed print, Lenticular cover, Inner print
Booklet
Leaflet/foldout
Figure/replica/props/memorabilia included

Playback
4K Blu-ray: Region free
2K Blu-ray: Region ABC

https://www.blu-ray.com/movies/The-Dark-Knight-Blu-ray/302074/