
KitSound MyFM2 Wireless FM Transmitter

KitSound MyFM2 Wireless FM Transmitter
I recently bought this transmitter. It connects well with the iPhone. I also found a free frequency on the radio. That works. However, after a few seconds the car radio always switches to another radio station, which is programmed by a transmitter. It does not stay on the free frequency with the transmitter. Can anyone help me?