Size: The general diameter of the clock addition is 2.8 inches (70 mm) and this refers to the maximum diameter of the front face, including the colored frame. Features: Quartz clock additional part has a golden frame for easy reading, a gold -colored frame, transparent plastic lens and black Roman figures Installation Diameter: Suitable for the round hole diameter: 2.4 inches (61 mm); Assembly depth: 0.7 inches (17 mm); Great to change handicrafts or old clock faces Rubber Band Installation System: It comes with rubber band gasket to keep the additional part ly on the spot and provides slight irregularity in the hole Power: 1 AAA requires battery (not included); Hot Note: The clock is only for interior use, not resistant to weather conditions Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia