N64 HDMI adapter - very well preserved - fully functional - HDMI cable not included.
eBay
N64 HDMI CONVERTER Integrated device,plug and play Plug and play, no need to install a driver Sound and picture synchronization, stable and smooth Video and audio in full digital HDM format with zero transmission loss High-definition decoding provides clearer picture quality Provides advanced signal processing, with extremely high precision resolution Specification: Item Type: Game Console HD Video ConverterMaterial: ABSTransfer Type: For N64, for ngc, for snes to HD Multimedia Interface Package List: 1 x Converter 1 x Power Cord.
eBay