This is Zigbee XBee Module S2C 802.15.4 2mW with Wire Antenna XB24CZ7WIT-004. The XBee 2mW Wire Antenna S2C, the latest of its kind in Series 2, offers point to multipoint device connectivity with ease, providing cost-effective wireless solutions for electronic devices. They are interoperable with other ZigBee feature set devices, including devices from other vendors.
This version (S2C) of XBee ZigBee Series 2 module utilizes EM357 transceiver. The EM357 transceiver is faster, has the lower current draw, and has significantly more RAM and Flash. These advanced features allow EM357-based modules to support more network traffic, have more memory for code updates, and operate more efficiently.