Simple to make fart sound: put the free side up facing the palm of your hand, make the vent face about 2 - 3 cm behind the end of your thumb, and then press hard, finally you can hear the fart sound; In addition, you can also hear different fart sounds by adjusting the position and squeezing speed, and the effect will be better if you practice moreQuality material: these fart noisers use reliable rubber as the material, there will be a little rubber smell, and it will be better if placed in a ventilated place for a period of time; Because it is made of soft rubber, the surface is easy to have a little electrostatic adsorption, and it may feel a little sticky, but this material is stable and durable, not easy to break and safe to use, you can use it with confidenceWhat you can get: package contains 2 pieces pooter fart machines in black, enough quantity to meet your various entertainment and pranks demands, and you can share them with your family and anyone elseWide application: pooter fart machines are very funny tricky toys to be applied in your home, school, classroom, elevator and other places, it will bring you or the people around you a lot of happinessNice gifts choice: the fart noise toys can be proper gifts choice for Christmas, New Year, April Fools, birthdays, parties and daily life to your family and friends, you will get an unforgettable time and much interesting memories"