If Zello were to be defined in a few words Walkie Talkie would be used. And it's that Zello is a simple and practical free application that will convert your PC into a Walkie Talkie, so you can talk with friends over the network, completely for free.
The hallmark of the program is that it's compatible with those using a smartphone and can communicate with several people at once. The only prerequisite is to have an internet connection either via network or WiFi.
Zello is easy to use. Like a chat program, you must register with a nickname and enter one of the hundreds of chat rooms already created or create a private for you and your contacts. What are you waiting for? It's free.