Not legal. FRS radios by regulation are not permitted to have external antennas. GMRS Radios (commercial grade, not FRS/GMRS combo units) CAN have external antennas. Remember, GMRS requires an FCC license though.
The antenna is a cheap one. It does not say but most likely it is a 1/4 wave antenna. It uses a magnet, rather than a solid connection to the vehicle body, so the ground may not be as good as it should be! If you are just going to use the CB for trav...
There are cell phone booster devices out (Tiger Direct sells them) and most are under $200. Its a box you plug in an outlet and thats it. These are nice for boosting cellular signals in steel and cement office buildings, etc. There are also external ...