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There seem to be several differnt models of the TV Card concept. These are are TV tuner, and hardware to provide a video display output. Some are PCI cards (and software) for a desktop comuter, while others are an external box that requires no software (but that won't capture images).
PRO-TV3 is an external box that doesn't need a computer. Comes with a remote contyrol, and autotunes TV stations. Anyware Computer $215 RRP. www.anyware.com.au