How does it work:Place the bird whistle on the tipof your tongue(with the round,white, jagged side backwards).Wet the whistle for one minuteand put it up against the palate.The bird whistle will sing, wheryou blow & pronounce soundslike TSH...CHIPS Or CHEESE! Key Features:1.Authentic Bird Sounds: recordings of real bird calls to entice and attract a variety of bird species2.Versatile Sounds: Includes a range of chirps, songs, and calls to engage different types of birds3.Durable Design: Crafted to withstand outdoor elements, ensuring it can be used in any weather4.Easy to Use: A device to be held in the mouth, allowing each person to blow and produce bird sounds Specifications:Material: paper+IronColor: white, blue, pink, red, yellowSize: about 1.1 inches/ 2.8 cm Package includes:1set x Bird whistles