It is said to be within one kilometer of the network, it works in one kilometer from one end to the other end. It is usually used to send urgent news, if there is any problem in the immediate danger, if one speaks from one end to the other, He heard that it happens through a channel, and there are 14 channels each Working on any one channel inside the channel, 14 channels, 14 people can use 14 channels to talk to a person, but hopefully you are able to understand. But if you do not understand then you can ask me, I will try to convince you. I'm able to know a lot about how to use it To rate it is usually 6 hours more than 9 hours after it is charged, if it wants, then the sound system will be shut down and if it is, then we can use it like mobile, there are two buttons, if we talk about a girl It will usually reach a certain point that you will be able to listen to the environment around you will be good for you. Thanks to all