Features: brand new and high quality Microbridge:When debugging demokit, the phone needs to turn on USB debugging. This is a USB Host expansion board and needs to be used for Arduino main control board. Support for most Ardu main control boards. The following device classes are currently supported by the shield:HID devices, such as keyboards, mice, joysticks, etc. USB to serial converters FTDI, PL-2303, ACM, as well as certain cell phones and GPS receivers. ADK-capable Android phones and tables. Digital cameras Canon EOS, Powershot, Nikon DSLRs and P&S, as well as generic PTP. Support for more devices is currently in development:Support for Arduino , etc. Also support MEGA1280, 2560. It makes Ardu very convenient to communicate with a USB slave device, such as USB keyboard, mouse, U disk, camera, Android mobile phone and so on. Using USB Host Shield with Ardu can also implement Google ADK. USB Host Shield Expansion Board/USB Host Expansion Edition-Let your Ardu support Android phones. Package Includes: 1 x USB Host Shield V2.0 ADK Specifications: Mterial: PCB note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!