How to adjust tarot two-way FM?

The knob in the middle is frequency band adjustment, and there will be 16 gear. Adjust it clockwise.

The knob in the middle of Tarot two-way FM is frequency band adjustment, and there will be 16 gear. If you adjust it clockwise, you need to adjust the two devices to the same gear, so that you can have a conversation, such as 1 to 1, 2 to 2, 3 to 3.

The first knob on the right is the power switch and volume adjustment, and the volume increases clockwise.