radios

Technically known as two-way radios, walkie-talkies were first developed during the 1930s. They got their more popular name because you could walk and talk at the same time, which was something that wasn’t possible with telephones back then.

Two-way radios work by receiving radio waves and converting them to audio, as well as sending radio waves that could then be converted to audio by another device.  However, walkie-talkies can’t always reach long distances, be it for a weekend-long camping trip or a nightly off-road exploration, as they require the use of a two-way radio signal repeater.