My Vont Bluetooth FM transmitter produces a static sound. What should I do?

Try switching to a different radio frequency. The device supports 200 frequency channels from 88MHz to 107.9MHz. Press the "CH" button to activate the frequency settings menu, then use  or  to set the frequency channel. Press and hold the button to adjust at intervals of 0.1MHz. After finding your desired frequency channel, press immediately and release the CH button to quit menu. If you do not take any action for 2 seconds, the device will exit the menu automatically.