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Radios can be purchased at YouTool or any Electronics Shop. Use Capslock for push to talk. Keybinds can be found on the overlay in the F2 menu.
/radio or drag to “Use” from inventory – Pulls up radio interface.
/radio “channel number” – Joins selected channel. You’ll know you’ve successfully joined if you see your channel at the top left of your screen.
Knob at the top right of the radio interface – Click to turn off radio.
ESC – Closes radio interface. You can not talk on the radio while the interface is visible.