A choice of four birds almost always present around us, near cities, villages and in the countryside. Except for our migrating Nightingale, it is only found in summer, unless you live in the far south of Europe. This box is perfect for easily entering the field of calls to speak to birds. To live with the times we offer you next to the user manual a QRCODE which, with the help of a modern mobile phone (smart phone, iphone, etc.) will allow you to directly view the way of playing the call (image and sound).