This is the SKXBee/SKXBee-Pro board without the module. This board is basically a USB to UART beakout board for XBee module and it comes along with the USB miniB Type Cable. The 2mm female header soldered on board allows you to plug in the XBee module without soldering. This board is aiming for user who owns the standalone XBee module.  Plug in the module, attach the USB cable and you are ready to use it as the XBee/XBee-Pro starter kit. The user manual under the useful document tab is only for reference purpose.

It is compatible with:

XBee Series 1
XBee Series 1 PRO
XBee Series 2
BlueBee
 WiFly Module

* SKXBee Boad is now in Revision 2.0. It has been designed with capabilities and features of:

Support XBee Series 1, Series 2, XBee Pro Series 1, Cytron’s BlueBee
USB Plug and Play, offer UART serial communication to XBee module
5V powered, with power indicator LED
On board Reset button
RX and TX indicator LEDs
RSSI and ASSOC indicator LEDs
5V UART interface, ready for microcontroller interface
Low power consumption
Compact yet easy and reliable platform
As serial port replacement (wireless)
Dimension: 55mm x 40mm
 
Please check out Cytron's XBee Tutorial for more applications. 

Useful Documents:
1) XBee PRO Datasheet
2) Fritzing Tutorial