This is a mono FM transmitter that is specially designed to be connected directly to the headphone output of your Walkman or any other type of audio source with a headphone jack.

It includes a stereo input circuit which will mix the left and right stereo channels into a single mono signal. The input is equipped with inductors that will match completely with the headphone output and therefore prevent any possible interference noise.

The transmitter is easily tunable to the entire FM commercial band (88 108 MHz) using an adjustable coil and is stable in frequency.

An ON/OFF switch and LED indicator are also incorporated right on the board. A battery holder is included, as well as a stereo plug which makes it very easy to connect to any audio device.