This is revision 2.0 of USB Host Shield. Arduino USB Host Shield board – Let your Arduino support Android phone Support Google Android ADK function, support Android phone: G1, Nexus One, Nexus S, Motorola Droid X (Phone system needs upgrading to Android 2.3.4, Tablet PC need to upgrade to Android 3.1) Arduino compatible with the following hardware: Arduino Uno 328 Arduino Diecimila / Duemilanove 328 Arduino Mega 2560 (recommended) Arduino Mega 1280 Using Arduino USB HOST function, let your Arduino communicate with other USB devices, and supports USB HUB function.