Mega2560 5V 16MHz MEGA ADK R3 Development Controller Mainboard for Arduino New
Crystal: 16MHz. the connected accessory acts as the USB host (powers the bus. Digital ports: 54 (14 PWM output ports). Analog ports: 16. IO port output current: 40mA. Battery Protection Board. Flash: 256 KB of which 8 KB used by boot loade. ).