The significance of "903" in this series is that it was one of the first releases in the catalog to be mastered natively for 4K resolution, rather than being an upscaled 1080p source. This distinction is crucial: true 4K offers four times the pixel count of standard Full HD (3840 x 2160 vs. 1920 x 1080).
: Typically available via digital download or streaming on premium JAV platforms that support UHD content. Technical Specifications Resolution : 3840 x 2160 pixels. ssis903 4k