N21 EVB provides various peripheral interfaces, including power supply interface, SIM card connector, antenna interface, PWRKEY button, RESET_N button, PSM_WAKE UP button, antenna interface, and HOST DEBUG inte rface s It helps customers t o learn the functions of N21 and develop hardware and software based on N21. N21 EVK contains the following components: N21 EVB (including 5 V adapter M5X0 PWR cable Other s ( 5V/2A adapter, antenna, etc.) Others (antenna)