CB Radio Explained. Freeband? Expo Kits? Uppers and Lowers? Admin 3 years ago CB Radio Explained. Freeband? Expo Kits? Uppers and Lowers? As part of a new series that will get into some of the more advanced parts of CB radio, Today we will cover the once popular “freeband” experience and talk about the hows and whys this once took place.
