thers no such thing mate! a normal scanner still works you need an earpeice to covert the beacon signals into voice reconnition ie tetra head set !! old police radio's you can buy have had all the channels wiped y? coz they still work!! the new signal is like morse code! and if you look at police officers the cant use the radio without the head peice! my advice is look at the latest bearcat scanners and get a tettra headset to fit that as these autolock on frequencys that are unknown ie tettra