Kilohertz (kHz) is a unit of frequency measurement in the International System of Units (SI). It represents one thousand cycles or oscillations per second. kHz is commonly used to describe the frequency of radio waves, audio signals, and various electronic components. In telecommunications, kHz is essential for specifying the frequency bands of radio stations and the capacity of data transmission channels. It is a fundamental unit for understanding the spectrum of electromagnetic waves and plays a crucial role in various fields, including broadcasting, telecommunications, and electronics.