Features: Support Google- Android ADK function; Androids phones supported: G1, NexusOne Nexus S, MotorolaDroid X (Mobile phone system needs to be upgraded to Android2.3.4, tablet- computer needs to be upgraded to Android3.1) Provide compiled APK- installation package and ADK- source file Compatible with- the following hardware: Uno328, Diecimila/Duemilanove 328, Mega 2560 (recommended-)Mega 1280 Enables the implementation of USB HOST function, can communicate with other USB devices, and supports USB-HUB function:Data down load,Code download Specifications: Item:USB Host Shield Supports:Google- Androids ADK & UNO MEGA Duemilanove 2560 Size:as pictures to achieve USB HOST function, you cancommunicatewith otherUSB devices, and support USB-HUB,Data down load,Code download Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment. USB input only supports 5V, output voltage- 5V, can only be charged-, and cannot transmit data. Package includes: 1 PC USB Host Shield