Radio-controlled (RC) refers to devices that are operated remotely using radio signals. These devices can include toys like cars, airplanes, and drones, allowing users to control their movements from a distance. The control is typically achieved through a handheld transmitter that sends signals to a receiver within the device. RC technology is widely used in various applications beyond toys, such as in hobbyist activities, aerial photography, and even search and rescue operations. The ability to control devices wirelessly makes them versatile and popular among enthusiasts and professionals alike.