"[Specific Intervals] When the allotted time is up, a cuckoo will emerge from its nest to sing and call ""coo coo"" to amuse you and your family [Quality] Made of solid wood, this beautiful cuckoo clock measures approximately 8.27 x 5.32 x 9.85 inches without the length of the pendulum [Components] The night shut-off sensor and music on/off switch are cuckoo clock components [Easy to Use] 1 switch and 1 button make it simple to set up and use [Note] This cuckoo clock requires 3 Type-C batteries (not included). For optimal efficiency and enjoyment, we advise using carbon zinc batteries and changing them twice a year. If you go out for a short vocation, you do not need to take out the batteries"