: The quartz clock head is made of metal material, which is not easy to damage, wear-resistant, has good waterproof performance, shock resistance, and can be used for a long time. Silent Wall Clock: Quartz wall clock sweeps seconds without ticking, ensuring you have a good sleeping and working environment, ideal for bedrooms, living rooms, dining rooms, family rooms, offices, hotels, kitchens and other occasions where precise timing is needed. Size: The front diameter of the quartz clock head is 103mm, the back diameter is 92mm (including the rubber ring), the total thickness is 48mm, the suitable installation hole size is 92mm, and the installation depth is 28mm (not including the height of the battery cover and time setting button). Wall Clock: Easy to hang, wide slot on the back, no welding or drilling required, it can be hung on the wall or other decorations very quickly. Battery Powered: The clock requires 1 x 1.5V AA batteries to help you run for a long time. (Batteries not included)