The Mega 1 is a watch, but it is different from ordinary watches. It is a radio controlled watch.
Most people regularly check their watches against a reliable time signal-like the ones you hear before news broadcasts on radio stations.
Now imagine a watch that could listen to those broadcasts, and set itself to the right time automatically! In 1991, the Junghans Company did just that. They developed the first radio-controlled watch and named it Mega 1.
The Mega 1 used standard radio time signals to synchronize an internal quartz clock once per day. A radio-controlled clock is similar to an ordinary electronic watch, but it has two extra components. It has an antenna that picks up radio signals, and a circuit that decodes them.