Hi-Fi Entry-Level PLL Stereo FM Transmitter Low-power FM Radio Transmitters allow you to take an audio signal from just about anything (CD, tape, iPod, computer) and transmit the signal wirelessly to an FM radio Freq. Range: 106.7-107.9 or 87.7-88.9 MHz Great broadcast range, solid signal strength and ease of use-- without blinking lights and gizmos that increase the price Broadcast Range: up to 200 feet The UX555 is a great compromise between price and performance