The FIRST system uses simulcast sites. The only scanners designed to receive simulcast are the Uniden SDS100 handheld and SDS200 base/mobile. Depending on your location in relation to the towers, you are tossing the dice as far as if any other scanner will work. For simulcast, the BCD436/536HP scanners work a little better than the BCD325/996P2 scanners, but there is no guarantee if any of the other scanners will work at your location or if you take it mobile.