Dioche RetroScaler2x Retrotink 2x RetroScaler2x A/V to HD Multimedia Interface Converter Line Multiplier Support Retro Latency Zero Output True 480p60 (BLUE)

Decent options in increasing order of price Rad2X cable (will only work with Nintendo consoles) https://www.retrogamingcables.co.uk/SUPER-NINTENDO-PAL-GAMECUBE-N64-HD-RAD2X-HDMI-CABLE Retroscaler2x (will work with anything that outputs composite): https://www.amazon.co.uk/Dioche-RetroScaler2x-Multimedia-Compatible-Multiplier/dp/B0GV5YVT2M?th=1 Retrotink2x (is the original design that the retroscaler copied. Supporting the creator supports new things): https://www.retrotink.com/shop/retrotink-2x-pro Retrotink 5x and Retrotink4k (the best choices if you have lots of consoles. Expensive, but packed with features. The 4k CE is a better choice than the 5x for a 4k TV): https://www.retrotink.com/shop/retrotink-5x-pro https://www.retrotink.com/shop/retrotink-4k-ce https://www.retrotink.com/shop/retrotink-4k