Feature: 1. Mini USB Host allows for Arduno (Pro mini version only) to implement the USB Host function and other USB devices. 2. Support USB HUB function. 3. Easy to operate, anti-aging, prolong service life. 4. Professional chip set provides superior performance in the system. 5. Made of high quality materials, which can effectively avoid corrosion and wear and are durable. 6. Precise notches and interfaces ensure perfect compatibility, suitable for installation locations, and easy installation. Specification: Condition: 100% Brand New Item Type: USB Host Shield Material: ABS + chip Voltage: DC3.3V power supply Communication interface: Serial Peripheral Interface Compatible for Arduno accessories: for Arduno 328 Arduno Diecimila/Duemilanove 328 Arduno Mega 2560 for Arduno Mega 1280. Support for Google Android ADK function, support for Android mobile phone type; G1, for Nexus One Nexus s. Droid X(mobile system needs to be upgraded to for Android2.3.4, tablets need to upgrade to for Android3.1). Package List: 1 x USB Host Shield