Radio-telephones are devices that facilitate communication between two distant parties using radio waves. These devices are also known by various synonyms, such as walkie-talkies, two-way radios, handheld radios, and wireless communication devices. Walkie-talkies are commonly used by military personnel, emergency services, and construction workers. Two-way radios are used by professionals such as event coordinators and security personnel. Handheld radios, on the other hand, are used by individuals for recreational purposes such as hiking, camping, and hunting. The term "wireless communication devices" encompasses a broader range of devices such as cell phones and smartphones that use wireless communication technology. Regardless of the name, radio-telephones have revolutionized the way we communicate, making it possible to communicate with each other from virtually anywhere.