DESC: If you wish to scramble all police laser and radar signals then the Rocky Mountain PHAZER II Scrambler is the unit for you. Its small, compact, and proven to work! If you you already have a radar detector and you don't to go and get a compo unit because its to expansive, then the PHAZER II is what you want. It will work with the unit you already have. So the PHAZER II will save you money.