Elegant Roman Numerals: This 80mm clock insert features classic Roman numerals on the clock face, adding a touch of timeless sophistication to your timepiece. Quartz Precision: The clock insert incorporates a high-quality quartz movement for accurate timekeeping, guaranteeing you always know the exact time. Easy Installation: Installing this clock insert is a breeze – simply drill a diameter of 76mm(3 inch), and a depth is 18mm(45/64 inch) hole in your chosen material, insert the clock, and secure it. Wide Application: Ideal for creating custom clocks, arts and crafts projects, and gift-making, this 80mm clock insert adds a touch of elegance to various creative endeavors. Battery Operated: 1.5V AA /LR6 battery*1 (Package not included) WINTAIM Clock Insert Replacement 80mm (3.15 Inch), Roman Numerals Clock Part, Small Clock Mechanism Battery Operated, Fit Hole of Diameter 76mm(3 inch) - Gold