1. 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.
2. Adjust the volume using the 
button.
How does my Vont Bluetooth FM Transmitter work?
