It's the only scanner that has tracking pre-filters in the front-end in VHF-HI that follows the frequency you are monitoring, like professional 2-way radios do. It also works good in the mil-air band. Uniden abandon the superior technology in later scanners as it probably are too expensive and also makes it difficult to use CloseCall, that is a selling point in Unidens modern scanners.
/Ubbe