Radio telephone is a commonly used term to describe a device that allows two-way communication using radio waves. However, there are several other synonyms for this technology that are equally valid. Two-way radio, walkie-talkie, mobile radio, and handheld radio are some of the common synonyms for radio telephone. While two-way radio is a general term for communicating wirelessly, walkie-talkie is a more colloquial term that is often associated with small, handheld radios used for communication by individuals or groups. Mobile radio is a term used to describe larger radios that are typically installed in vehicles or other mobile platforms. Handheld radio is a synonym that emphasizes the portability of the device. All of these synonyms refer to the same technology, but they may be used in slightly different contexts depending on the situation.