480p. It doesn't upscale or alter the image because it takes the best possible output from the Dreamcast (VGA signal) and outputs it as HDMI (along with audio). Trying to upscale the image (at this point in time) causes too many issues. The only other way is to get a 'DCHDMI kit' that is installed inside the internals of the Dreamcast and that requires a lot of skilful soldering and is an expensive modification. This is probably the best 'plug and play' solution right now. Thank you, Kaico

Anyone know if this is compatible with the elgato hd capture card? the pound cable did not seem to work with it.

Nope. Tried it just now & it says "format not supported."

The quick-start guide says that the led light would be green to indicate that it is working, yet it is blue and still working. should i be worried?

I think as long as it's still working you should be fine. I don't even use mine much anymore meaning my Dreamcast.

Why won't it go full screen? the size is about 16" x 16" on a large 50" sony tv

That would be part of your TV's settings. The Dreamcast runs at a low resolution, so it's not using the full screen. Look in your TV's settings for something that says "stretch", "fit", or "scale". Your TV may also just not support 480p video.

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🎮 Elevate your Dreamcast legacy with crisp HD visuals and effortless setup!

PEACE OF MIND WARRANTY - 12-month Kaico Labs warranty with dedicated support, repair, or replacement.
CRYSTAL CLEAR HD OUTPUT - Experience your classic games in stunning 1080p clarity with zero audio/video loss.
DUAL MODE VIDEO SUPPORT - Switch effortlessly between VGA and RGBS for flawless visuals on every Dreamcast title.
UNIVERSAL COMPATIBILITY - Works with all Sega Dreamcast games, ensuring no title is left behind.
SEAMLESS PLUG PLAY SETUP - Get gaming instantly—no complex installation or extra converters needed.

The KaicoSega Dreamcast HDMI Adapter is the first all-in-one AV cable that converts Sega Dreamcast VGA and RGBS signals to HDMI, delivering pristine HD video and audio on modern TVs. It supports all Dreamcast games with easy mode switching, requires no additional converters, and comes backed by a 12-month warranty for reliable performance.