This double open reed design produces simultaneous sounds of two estrus cows competing for the herd bull. You can also create excitement by sounding like multiple cows and calf�s. Bulls can�t resist the various mews of this call; the sound capabilities are endless. Double your chances of calling �em in On The Double. - Produces sound of two different estrus cows at once - Allows user to mimic sound of two cows fighting for attention of the herd bull - Two reeds allow complete range of sounds