Easy to read with large black numerals and clear glass to prevent dust from entering the dial. Simple to use with a small wheel on the back to easily set the time and runs on 1 AA battery not included. Size Details: The diameter of each sticker is 30cm. Super quiet with a high-quality sweeping movement, providing precise timing and absolute silence, especially at night. Energy-saving design that runs on battery power, ensuring long-lasting performance and easy wall hanging.