Modern Cuckoo Arabic Numeral Wall Clock Little bird flying out every hour from the door with cuckoo sound in echo effect just like you are in the jungle. It has light sensor for automatic switch the hour reminder off when there is no light at night. Battery: 2 x D size battery High / Low / Off volume settings Size: 29.5 x 29. x 12cm (not include pendulum) / size of clock dial: 13.5cm