Do you remember your old classical radio system? This radio was being used to listen to several programs like music, news bulletin, etc. A typical radio works in a unidirectional way. It can receive a radio signal but can’t transmit.

Walkie-talkies are a kind of portable radio.  But you can receive as well as transmits radio signals by using walkie-talkies within confined areas. So they can communicate bi-directional using radio frequencies.

What are Walkie-talkies?

A set of Walkie-talkies

A set of Walkie-talkies

Walkie-talkies are nowadays being used to communicate wirelessly by using radio waves. They have two units. Each unit contains a transceiver of a particular radio frequency. Two or more differently located users can communicate with each other by using Walkie-talkies. To achieve this peoples have to tune their Walkie-talkie at the same frequency. One limitation of this gadget is that it provides a confined area for communication (due to limitation in radio frequency range).