Radio system
scientists have tried in finding ways to signal the distance for a long time until the year ADThe nineteenth and 1 Marconi, he can signal wave. Radio across the Atlantic for the first time, and has developed the radio communication system in the present
.Radio communication as a receiver - signal radio. While most of the radio cell is approximately 5 km depending on the state of the country and the weather
uses
.The call traffic, weather, inform the disaster coordination accidents accident crime, talk and news services to members. Support to those affected by the various advantages 1
.A broadcasting coverage area widely, and there were stations. It can send a message to the audience a lot of
2. Speedy delivery information. The audience received information quickly and timely events
3.Media, with low cost. Compared with other media, the frequency and access to consumers as much
4.Hit the target. Those who can't read, it can be. Cover the area very spacious
1 disadvantages. The age of the short message. If the audience missed advertising program. Can't go to listen again
.2 have limitations in the visual and the age of information in which the short
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