Features: Easy to install, convenient to use. 1x AA Battery is needed (Not included). Replacement for old or damaged clock movement. Made of high-quality material, durable, with long service life. Overall shaft length: 14.5mm, thread height 7mm, suitable for passing through 4mm thick panels. Specifications: Material: ABS Size: Approx. 56x56.7x16 mm / 2.20x2.23x0.63 in Solar movement Use voltage: 1.3V to 1.7V Time accuracy: 25 seconds per month (1.5V DC) Current consumption: Less than 150μA (1.5V DC) Operating temperature: -10°C to 60°C Battery life (specifications): Approx. one year (UM-3) Weight: Approx. 25g per piece Second hand output torque: 0.6gf-cm (1.5V) Minute hand output torque: 30gf-cm (1.5V) Pointer specification requirements: Second hand length/weight: 130mm, 2g Minute hand length/weight: 160mm, 6g Second hand unbalanced moment: 0.15gf-cm Minute hand unbalanced moment: 6gf-cm Note: 1x AA Battery is needed (Not included). Please allow 1-2cm errors due to manual measurement; ensure you are comfortable with this before ordering. Due to differences between monitor displays, the image may not reflect the actual color of the item. Package includes: 1x Clock Movement