This firmware update is for the Microtronix DX-4400 SD/HD/2K/4K SDI Text & Graphics Overlay Inserter product, Model Part Numbers: DX-4400-TI-2K and DX-4400-TI-4K.
This firmware update is for the Microtronix DX-2200-TI-xx SD/HD-SDI Text & Graphics Overlay Inserter product, Model Part Numbers: DX-2200-TI-14 and DX-4400-TI-24.