2Replace the battery cover. Make sure that the cover is securely in place.
3To turn on the transmitter, press and hold the power button 
for two seconds. The transmitter turns on.
4Press +/- to choose a channel, then connect the transmitter to an audio source.
5Turn on both the audio source and the FM receiver (FM radio), then tune your receiver to the same frequency as the transmitter. The music from the audio source is played on your FM radio.
Tip: The audio source can be any audio device that accepts a
3.5mm stereo jack, so a portable CD player, MP3 player, MD player, computer, PDA, television, and even another FM radio can be the audio source. Since the range of the transmitter can vary widely depending on the presence of other electronic devices, building materials, terrain, and distance, you should experiment on your own to determine its useful range for your use.
6To turn off the transmitter, press and hold the power button for two seconds.
Programming frequencies into the transmitter
In addition to the preset frequencies, you can program any of the ten memory channels to any frequency from 88.1~107.9 MHz.
To program or change a frequency on the transmitter:
1To turn on the transmitter, press and hold the power
button 
for two seconds. The most recent frequency the transmitter used is selected and active.
2