Good clock replacement: reliable quartz movement for accurate timekeeping. Simple design, easy to use. Energy efficient. Ideal for repairing, replacing, or crafting clocks. Wide application: suitable for use in home clocks, three-dimensional embroidery, craft clocks, frameless wall clocks, clockwork projects, and more. Perfect for DIY clock kits and ideal for replacing quartz wall clock movement components. Type: Clock Movements Size: Total shaft length 20 mm (0.8 inches), thread length 14.6 mm (0.57 inches). Jump second movement fits clock panels 913 mm (0.350.51 inches) thick. Rated voltage: 1.5V Battery life: up to 12 months with UM-3 battery Battery: 1.5V AA carbon battery (not included) Instructions: 1. Attach the clock mechanism to the desired surface. 2. Install in the standard 12 o'clock position. When installing, ensure the hour and minute hands are parallel. 3. Insert the battery only after pulling out the positioning pin from the back of the mechanism. (Do not insert the battery before removing the locking pin.) Material: Plastic + Aluminum Color: Black + Gold Package contents: 2 x Quartz clock movements 14 x Clock hands 2 sets x Accessories Note: Light and display settings may cause slight color variation between the image and the actual item. Measurement may vary by 13 cm.