Very realistic and easy to master. Megaphone for deep grunts, cow whines and moans. 100% freeze proof open reed design for wide range of tones. Special wide, soft reed makes smoother estrus cow moans, cow protest whines and grunts. It's very loud and realistic. Reed mouthpiece can be removed and megaphone used for voice calling or to scoop up water to mimic the sound of a cow urinating - brings big bulls running!