Each country in Europe has their own VAT rates. In the EU, the minimum standard VAT rate allowed is 15%.
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TVs don't play at variable rates yet, but they accept multiple fixed ones.
Go get a cross section of manuals on a range of TVs. Per HDMI port options are limited to specific resolutions and frequencies. Even if you choose the HDMI frequency that doesn't mean it is honoured all the way to the glass.