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The DFRobot Arduino-Compatible Screw Shield is a terminal expansion board that allows you to screw in jumper wires to a screw terminal for a much stronger and secure connection for your I/O and power pins. Feel secure with this arduino-compatible screw shield.
We commonly use:Green for digital I/O;Blue for Analog I/O;Red for Voltage
The Arduino XBee shield is designed to meet wireless sensor networks such as wifi, bluetooth 2.0/4.0 and zigbee. The module is easy to use, low power consumption, and the provision of critical data between devices reliable transmission.