But will it call in more than a FoxPro, Lucky Duck, or Icotec, that's the question isn't it? Seems to me like there isn't a perfect way to test one. Best I can think of is to call for 20 minutes with any of the other calls, and then call with the Freq to see if anything responds that didn't come in on ordinary calls. It would be necessary to use similar sounds on both units, but of course coyotes could be coming on the ordinary sounds and not be seen until the Freq started playing. I can't see any other way to really draw a comparison. If coyotes often come to the Freq after the ordinary calls have been played then perhaps one could justify 2 grand for a call.