Muji Cuckoo White Clock is made using meticulously hand-crafted bellows, this cuckoo clock tweets with a natural tone that differs from digital sound. Attached with light sensor which turns off the sound in dark environment. Beautiful match with your unique home decors. Can stand alone or be mounted on a wall. Includes 1X AA battery. Chime functions: On the hour or every half hour. W9.5 x D10.8 x H20.4 cm.