This refers to the video resolution.
Los hermanos enfrentan a los Leviatanes, la Marca de Caín y el surgimiento de nuevos reyes en el Infierno. Supernatural Serie Completa Dual 720p
If you specifically want to download or stream Supernatural with dual audio 720p, you can try the following: This refers to the video resolution
Digital purchase/rental
: Most "dual" releases also include optional Portuguese and English subtitles (.srt files or embedded). Supernatural Serie Completa Dual 720p