You can set the frequency on the walkie-talkie and assign it to a channel.
To toggle the walkie-talkie's power, press Shift-RMB.
When you right-click while holding the walkie-talkie, its interface will open. The left and right arrows change the channel; to enter a frequency, press the numbers on the keyboard, then press Enter.
To speak on the radio, place it in the Curios slot and press the bind key (default: B). Use [ ] by default to switch channels, and press Home to open the active radio’s interface.
