radio transmitter (noun)

1. The priest used a radio transmitter to broadcast the sermon to all the faithful followers.

2. During World War II, the radio transmitter was used to communicate important messages between soldiers on the front lines.

3. In the romantic movie, the protagonist sends secret love messages to their partner using a hidden radio transmitter.

4. In the popular anime series, the high school characters communicate with each other through a mystical radio transmitter, helping them solve mysteries together.