All you have to do is create a sound near the bird on the branch and it will start to shake its head, open its mouth, shake its wing and tail and sing a bird song. The bird's bright singing will relax your body and mind and bring you back to the great nature, where you can be entirely freed from worry and enjoy a moment of placidity. Features: A beautiful decoration for your home Powered by 3 x AA batteries (not included) Sound activated - bird flaps and sings when there is a noise Sound activation works by detecting increase in noise level, so it will work even in noisy environments Can be used as a security device (bird things when someone makes noise) The cage measures 27cm tall (10.5") and has a diameter of 18cm (7")