AJA Video IOX-RM 1RU 19 Inch Wide Rackmount Kit. AJA's Dante AV 4K-T and Dante AV 4K-R can be mounted side by side on the IOX-RM Rackmount Tray for use in rack mounts and fly cases. This tray is also compatible with Io X3 Thunderbolt 3 I/O devices for mixing and matching as desired.