General description Large 30cm modern silent quartz wall clock designed for various settings including bedrooms, kitchens, offices, and schools. It features a classic and simple design with beautiful HD patterns, making it a timeless addition to any decor. Technical specifications Diameter: 30cm Material: 4mm thick tempered glass Power source: Requires one AA battery (not included) Installation Easy to install by hanging on a nail, screw, or hook using the keyhole slot on the back of the clock. Usage Ideal for use in bedrooms, schools, offices, living rooms, kitchens, or commercial applications. For optimal performance, use ordinary carbon batteries instead of high-performance alkaline batteries.