Wireless communication (or just wireless , when the context allows) is
the transfer of information (telecommunication) between two or more points
without the use of an electrical conductor, optical fiber or other continuous
guided medium for the transfer. The most common wireless technologies use
radio waves. With radio waves, intended distances can be short, such as a few
meters for Bluetooth, or as far as millions of kilometers for deep-space radio
communications. It encompasses various types of fixed, mobile, and portable
applications, including two-way radios, cellular telephones, and wireless
networking.