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KEYESTUIDO Mega plus Board, whose processor core is ATMEGA2560-16AU, is fully compatible with ARDUINO Mega REV3.This plus board consists of 54-channel digital input and output ports, of which 15 pins are served as PWM output, 16 analog inputs, 4 serial communication ports, one 16MHz crystal oscillator, 1 USB port, 1 power socket, 1 ICSP interface and 1 reset button.