What is PAN
It is basically a network which is used for communication among computing devices which includes mobile,laptop,headset,mouse,printer,tablet and more personal digital devices. PAN stands for Personal Area Network and it is categorized into cabled PAN and wireless PAN.
Unlike other conventional network which is mainly used for high bandwidth applications are require more time to establish the connection and need more power. PAN is designed for lighter low data rate monitor and control applications and need less time to establish the connection and hence require less power.
The bluetooth,zigbee,Z-wave and skinplex falls under PAN wireless technologies. Refer following links to know basics of all this PAN technologies in detail. PAN has got different frequency ranges based on technology and country of application.