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 蓝牙是由蓝牙特别兴趣小组( sig )制定的短距离无线通信技术,其最初的主要目的是取代电缆,用电磁波来实现手机、 pc和手持终端等各种设备间的连接。