Lieske Electronics 4duino_Yun_Shield, to extremely powerful development for Arduino board, is designed to solve the problem of connection and storage Which exist in the Arduino board. Lieske Electronics 4duino_Yun_Shield runs OpenWrt open source system (Same system as runs in Arduino Yun) and it is fully compatible with Arduino IDE v1.5.4 or later versions. Yun Shield is an ideal choice for Arduino Projects Which require various internet connections and more storage.Actually, Lieske Electronics 4duino_Yun_Shield is equal to the official Arduino Yun, but is more flexible 4duino_Yun_Shield Because it can work with other Arduino board: such as Uno, Duemilanove, and Mega etc. 4duino_Yun_Shield uses External Antenna Which Provides stable connection under various environments.The 4duino Yun is the core module of 4duino_Yun_Shield. And it requires 200mA current When in full load, so it is powered by the Arduino VIN pins to avoid overheated in the Arduino onboard 5V LD0.Features:. 1 Open source Linux system (OpenWrt) inside2. Low power consumption3. Compatible with Arduino IDE 1.5.4 or later versions. Users can program, debug or upload to Arduino Sketch board4. Managed by Web GUI, SSH via LAN or Wifi5. Software upgradable via network6. Support internet connection via LAN port, Wifi or 3G dongle7. Support USB flash to Provide Storage for Arduino projects8. Reliable design Provides robust system9. Compatible with Arduino Leonardo, Uno, Duemilanove, Diecimila and Mega