what is vox on a walkie talkie

VOX stands for "voice-operated exchange" or "voice-activated transmission". It is a feature found on some two-way radios or walkie talkies that allows hands-free communication. With VOX switched on, the radio microphone is always listening, and it will automatically start and end a transmission once it hears your voice. This feature eliminates the need to push the PTT (push to talk) button every time you wish to communicate. The majority of radios are VOX compatible, but only a few come with a switch that allows you to switch between the PTT button or VOX. VOX accessories such as earpieces are also available to make hands-free communication easier.