Bluetooth - definition
BlueTooth is a channel/name of communication method based on certain radio frequency. From the very beginning, it has been used by mobile devices to share files in between two(2) devices. Apart from that it is also used for tethering, hotspot creation, streaming audio/video through proper channel. BlueTooth is very reliable medium of data transmit/receive. The usual range is from 10m to 100m. There are several version of BlueTooth which are noted as BlueTooth 1/2/3/4/5.