Bird sound

In this series, a special hobby for people who listen to the sound of birds. In today's hobby listening to the sound of birds does not mean we must have a bird, with this simple circuit we can easily hear the sound of birds without the birds were exhausted and without feeding. Anytime, anywhere it's up to how long live push.
Consider the following series.














How it works:
Give the power supply on the set of sounds of birds will sing.
Good luck.