These walkie-talkies are also rugged, ... but the ArcShell AR-5 rechargeable radios are by far the most economical if you’re looking to set up a larger group for communication.

ArcShell Long Range Walkie Talkie. These walkie talkies are the most serious units on our list. There is no screen, just an audible programmed voice to let you know what channel you’re on.