The Motorola HAD4006 is a low-profile VHF (136-144 MHz), ‚¼ wave roof mount antenna. It is compatible with Motorola CM200D, CM300D, XPR 2500, XPR 5350e, and XPR 5550e mobile radios as well as several Icom and APX models.
The HAD4006 has a signal that radiates vertically, making it ideal for urban environments where buildings can obstruct the signal.