Function:1. Made of high-quality plastic material to ensure maximum durability, it has a long service life.2. Shipping with batteries solves the problem that you need to buy the batteries yourself.3. The compact packaging makes it easy to carry and also convenient to carry.4. Allow yourself to replace the movement, saving you expensive repair costs.5. Important replacement watch accessories that are easy to install and reliable in use.Specification:Item Type: Clock MovementMaterial: plasticBattery type: SR621SW button battery (included)Battery capacity: 18 mAhUsage: to replace the watch movementPackage list:1 x clock movement, 1 x pin1 button cell