In the first years of the new millennium, in the development of radio control technology with 2.4 GHz, a real revolution has taken place. While the frequencies in the MHz range were standard over many years in model construction, a large proportion of modern communication technology and with it radio control (RC) has since taken the band between 2.4 GHz and 2.48 GHz. Contents: Components of a radio control - Properties of 2.4 GHz waves - Antennas - Modulation and data transmission methods - User interface and programming - Telemetry - Assembly and initial operation