Seeeduino ADK Main Board - Supports Android V2.3.4 and Above Devices Android Open Accessories development Kit (ADK) compatible, Supports Android v2.3.4 and above devices. Works with Android Debug Bridge (ADB) using MicroBridge, Supports Android v1.5 and above devices. Arduino Mega 2560 compatible (256K Flash MCU) Simply works like an Arduino Mega with an integrated USB Shield Red PCB, ROHS compatible and Golden finish 5v/3v3 IO Level selectable (Atmega2560 running on 16MHz@3.3v is a bit over-clock, but according to the test result, works fine)