This cable allows to connect your Spectrum 128 with the SCART connector of your monitor or TV easily. It is both RGB and composite video signal transfer. The RGB - signal is actually the better, but unfortunately a lot of television today need a switching signal to the RGB mode to activate. This signal does not provide the spectrum. Thus appears on many TVs, the composite video image, which also has very good quality compared to the normal antenna connection. If you have your TV or monitor, but an option to switch to RGB, the picture becomes even clearer.