The orange has Helder's 1.4 AIO board, USB Audio is soldered to USB connections on the board but not activated due to the board (or retropie) not recognised the USB Audio board so the sound output is PWM on this one. It came with Pi Zero W and 16GB card, enough for handheld consoles roms.
The red has Helder's audio board, pro micro and USB audio. The USB audio is working on this one. It came with Pi Zero and with 32GB card.
Price £150 each.
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Red Pi ZeroShow