Radiofrequency :
Radiofrequency (RF) refers to the rate of oscillation of the electromagnetic radiation spectrum or electromagnetic radio waves. From the frequencies ranging from 3 kHz to 300 GHz, as well as the alternating currents carrying the radio signals. With the use of that communication transmission and broadcasting.
Radiofrequency is measured in Hertz which represent the number of radio cycle per second when a radio wave is transmitted. Radiofrequency is not visible to the human eye.