The best "ideal" DC Adaptor for the GP32 uses the same TYPE of connection as the Gameboy, but with the polarity reversed (Negatve on the inside). Volts should be selectable to 3, mA (milliAmps) should be within 300 to 500 mA. I think mine is 600, but so far, I've been lucky (knock on wood). As for the cord, try for an adaptor with a cord of at LEAST 6 feet. Longer is better, but nothing's perfect