Bluetooth is a technology developed for short - range wireless communication by bluetooth special interest group ( sig ) . the purpose of bluetooth technology is to replace the cable and connect various devices such as cell phone , pc and pda together by electromagnetic wave 藍牙是由藍牙特別興趣小組( sig )制定的短距離無線通信技術,其最初的主要目的是取代電纜,用電磁波來實現手機、 pc和手持終端等各種設備間的連接。