This is a versatile and very playable instrument capable of some bizarre and unique sounds never previously heard. Produces a wide variety of sounds by shaking the tube with 1 hand and opening and closing the top of the tube with the palm of the other hand. Make additional weird, spooky and alien-type sounds by scraping or tapping the spring. No batteries required. Easy to use and includes playing tips. Size: 70mm diameter x 178mm height.