FAS1 Modern DIY Large Wall Clock Big Watch Decal 3D Stickers Roman Numerals Mute Wall Clock Home Office Removable Decoration - Black (Battery NOT Included) Reference size(diameter):90-100cm(standard); 70cm(minimum); 130cm(maximum) Made from acrylic material, present a mirror effect on the wall. Runs on one AA battery(battery NOT included). No harm to the environment and health,easy to paste the decal, it is removable without damaging your wall. Click the brand name FAS1 above for more styles