ITEM NAME:ATMEGA16U2 Board For Arduino Mega 2560 R3 Board Kit Compatible With USB Ca N Ew.1 X Arduino 2560 R3 Board (Compatible Improved version). 1 X USB Cable. DC Current for 3.3V Pin: 50 mA. Analog Input Pins: 16. Clock Speed:16MHz. EEPROM:4 KB. SRAM: 8 KB.