DIY Wall Clock Non-Ticking Silent Clocks Home and Kitchen Decor Specifications Product Size: 12In&9In Material: made of Acrylic & Silica Gel Edge Power Source: 1 x AA battery(not included) Movement: Silent Movement Package Included: ONE Wall Clock, Dest Clock Support Stand NOTED: 1. When calibrating the time, first move all hands to the twelve o'clock position, and then insert the battery to start adjusting the time from the back. 2. If the pointer is out of alignment or stuck, you need to disassemble and reinstall it by yourself. 3. Do not use too much force during installation to avoid damage to the pointer. 4. Move all hands to the twelve o'clock position, make sure that the second, minute, and hour hands remain parallel, and then insert the battery to start adjusting the time from the back.