IoT(Internet Of Things)
WPAN - XBee
XBee is a brand name (not a name of a technology) which is implemented based on IEEE 802.15.4. It is designed for point-to-point and star communications at over-the-air baud rates of 250 kbit/s. In terms of basic standard, it is similar to other 802.15.4 based technology like ZigBee, but Xbee is designed for lower cost and easy to use solution that may sacrifice some of functionality (e.g, Mesh Network capability) from the standard. It looks as shown below. You can easily embed this onto your board or more easily plug into Arduino and have fun.