The keyboard interface built with the AT42QT1060 controller can operate in two modes: stand-alone mode, where each button directly controls its corresponding LED without a microcontroller, or I2C mode, which enables communication with a microcontroller for adjusting button sensitivity, using low power mode, and controlling seven GPIO lines. It features 6 buttons, 6 LEDs, 7 independent GPIO lines accessible via a goldpin connector, supports 3.3 V supply, offers programmable sensitivity and low power operation, and comes on a compact 65 × 100 × 15 mm board with printed buttons.