This is the XBeePRO S2C XBP24CZ7WIT-004 module from Digi. The new Series 2C improves upon the power output and data protocol of the Pro Series2. Series 2C modules allow you to create complex mesh networks based on the XBee ZB ZigBee mesh firmware. These modules allow a very reliable and simple communication between microcontrollers, computers, systems, really anything with a serial port! Point to point and multi-point networks are supported.
The XBee/XBee-PRO ZB (S2C) introduces the SPI serial interface to Digi’s through-hole ZigBee radio. Please refer to the XBee/XBee-PRO ZB (S2C) product manual for more information.