ADK is such a controller based on Android devices, size is extremely small, ADK and Google ADK.<br> The ADK can be developed using Google's ADK and can run on Android 2.3.4 or Android 3.1.<br> A number of sensors and application modules can be connected, such as Hall sensors, button modules, thermistors, accelerometers, LDRs, potentiometers, touch sensors, joystick sensors and MOSFET modules, etc.<br> QUALITY: High quality material, safe and durable.<br> Controller: ATmega2560<br> Working voltage: 5V<br> Input voltage: 7-12V<br> Limit voltage: 6-15V<br> Digital ports: 54 (including 14 PWM outputs)<br> Analog port: 16<br> IO port output current: 40 mA<br> 3.3V power supply output current: 100 mA<br> Flash: 256 KB of which 8 KB used by bootloader<br> SRAM: 8KB<br> EEPROM: 4KB<br> Crystal: 16 MHz<br> Material: PCB<br> colour: blue<br> Package Contents:<br> 1 x Development Board<br> 1 x USB Cable<br> Only the above package content, other are not included.<br> Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.