If you are using a XBee XSC S3B on our XBee Shield board, you must remove the RSSI status LED and put a 10Kohm Pull-UP resistor between the 3.3V and Din pin of XBee socket. If you have questions about this process, you can guide with the following example image.
This is the XBee Explorer Dongle unit for the XBee line. With the XBee Explorer dongle you can now plug the unit directly into your USB port. No cables needed! This unit works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. The on-board voltage regulator is good up to 500mA.
You get the board only. XBee modules sold below.