This FAS1 Modern DIY Large Wall Clock features a big watch decal with Roman numerals, perfect for home or office decoration. It offers a reference size diameter ranging from 70cm (minimum) to 130cm (maximum), with a standard size of 90-100cm. Made from acrylic material, it presents a mirror effect on the wall. It runs on one AA battery, which is not included. The material is safe for the environment and health, and the decal is easy to paste and removable without damaging your wall.