The whistle is placed flat against your lips, like you are going to kiss the whistle, then you simply blow air through the hole. Depending on how hard you blow is how loud the sound is. Designed to imitate the sound of an injured rabbit. Can be manipulated to sound like the last pitiful death cry, or absolute frightening panic. Just cup your hand and open and close to change the sound . Usualy start with very loud squeals and then taper them off to a very faint cry. If you have no luck for about 20 to 30 mins move on as there is probably no one home , but always be ready as you never know when you are going to be in luck