The driving board adopts special circuit design, which can drive LED light within 27V and current output of 200MA at most Integrated, and two color LED display This driving board can the function of automatic detection on and off touchable function, integrated touchable chip, 6P definition, GT911-928 and other sink capacitor chip earphone output function, two kinds of earphone standard interfaces, and common 3.5MM headphones used by most mobile phones