While listening to one frequency, you can monitor a second. Press [F] + [BAND]. Use the arrow keys to set a second frequency. The radio will flip between the two every 1.5 seconds. If a signal appears on the second channel, it locks on.

Front Panel:

Side/Back Panel:

If you have lost the physical booklet, do not panic. The keyword Dx-ar-8108 Radio User Manual can be found in several digital repositories:

Warning: Avoid sites asking for credit card information for a "premium manual download." The Dx-ar-8108 manual is a free document.

The manual typically labels three key zones:

Model: Dx-ar-8108
Type: Portable AM/FM/DAB+ Digital Radio
Version: 1.0