The EyeTV Diversity Capture device is a TV tuner hardware produced by Elgato that allows users to watch and record live TV on their computers. The device typically includes dual tuners, which allow for simultaneous recording or watching two different TV channels at once, which can be particularly useful for watching and recording digital terrestrial (DVB-T) or cable TV signals.
The EyeTV Diversity Capture Windows driver is the software that allows the EyeTV Diversity hardware to work with the Windows operating system, enabling it to function as a TV tuner device for your PC.