Two-way voice was one of the first commercial applications of radio technology. In 1933, the first two-way mobile radio system was installed in patrol cars of the Bayonne, New Jersey police department ...

The ‘phones in question are particularly interesting, as they turned out upon inspection to be a two-way radio in disguise. Cracking them open revealed a radio board and a logic board ...

A team of bioengineers at Tsinghua University, working with medical research colleagues from Tianjin University, both in ...