MEGA 2560 The Mega 2560 R3 board uses the how controller chip ATmega2560 16 AU and ATMega16U2 which is the same as the official Arduino Mega 2560 board COMPATABILITYThe Mega board 2560 is 100% compatible with Arduino IDE and designed for Arduino Mega Kit project Easy OperationThis 2560 board contains everything needed to support the microcontroller; Just plug it into a computer with a USB cable or attach it with an AC-DC adapter or battery to get started.Mega 2560 R3 Mega2560 REV3 Board Compatible for Arduino(No USB Cable) This version is optimized in the original version, mainly for foreign customers under the functional requirements for product quality and high case designed both to ensure consistent and compatible with the original, but also easy to use . Note: Features: 1. Completely solve the traditional 2560 board is not compatible with win7 and win8 system instability above. 2. Increase the pin socket, to facilitate the use of DuPont line. 3. Replaced 16u2, so the cost is reduced. Package Contains: 1 x Mega 2560 R3 Board (no USB Cable)