Korean researchers say they've developed the world's fastest wireless system.

The Electronics and Telecommunications Research Institute (ETRI) says the new device can transmit data wirelessly at three-point-six gigabits per second (Gbps) over a mobile network.

That means a person can receive on their mobile phone or computer four-point-seven gigabytes of data - one DVD's worth - in ten-and-a-half seconds and a five-megabyte MP3 song in one-hundredth of a second.

ETRI researchers say the device transmits data three times faster than previously existing technologies and is a year ahead of research in the U.S. and Japan.