This is a set of two Blackmagic Design Monitor 3G units. One unit was opened once for functionality testing, but the other is unopened. Individual sales are also possible. The regular price for one unit is around 20,000 yen, so this is a great deal. You can play 3G-SDI/HDMI on a Thunderbolt 3 compatible PC. The UltraStudio Monitor 3G supports broadcast-quality 10-bit professional SDI/HDMI monitoring with popular editing software such as DaVinci Resolve, Final Cut Pro X, Media Composer, and Adobe Premiere Pro CC, and also supports high-end broadcast graphics and title systems.