Size Specifications: Clock Size (normal configuration as shown in the pictures): Round Diameter from 70cm-120cm(DIY Size) Minute hand: 33.5cm Hour hand: 27.5cm Centerpiece: 10cm Color: Black, Silver, Gold, White, Luminous for Option Package contains: 1 x 3D DIY Mirror Wall Clock Kit The Superiority of the Clock Mechanism A high quality clock mechanisms is the premises for the wall clock to keep the precision time. Real 0 decibel, say bye to the annoying ticking voice, enjoy your peaceful time. The energy conservation technology can ensure the batteries to last long. The clock mechanisms of the 3D DIY wall clocks are from world famous quartz factory, so the quality of the clock mechanism is ensured. Please note that only 1.5V AA carbon battery suit, and our package is not include the battery *How to Adjust the Pointers: If want to adjust the hands to regulate the time, please slightly rotate the round setting, which is at the back of the clock mechanism. Don’t directly to rotate the hands, because it’s easily to damage the mechanism in this way. *Please Note: 1. There are protective films on the surface of the numbers and the hands, please remove them when installing. 2. 1*AA carbon battery is required for operation (not included).Please do not use alkaline batteries, whose hight current output will damage the clock mechanism, because the mechanism is low power consumption. It is recommended you to use an ordinary carbon battery .