This Robotime® Owl Clock has an exquisite look with elegant Roman numerals on the dial. An artistic piece of home décor, the clock also tells time accurately with a battery powered quartz movement. The laser-cut plywood pieces fit precisely together. Estimated assembly time 4-5 hours. No glue required.Features: Bell timer driven by a spring (up to 30 minutes) Accurate quartz movement powered by battery (battery not included) A spring-driven pendulum with precise anchor escapement Appealing owl shape and beautiful Roman numerals dial No glue required Unique 3D mechanical puzzle Each of the pre-cut pieces are laser cut, precise and smooth Specifications: Model Number: Robotime® LK503 Assembled Size: 8.11" x 5.04" x 10.43" Piece Count: 161 Energy Source: Battery/Windup Assembly/Build Time: 4 hours What's Included: (1) Robotime® - Owl Clock Kit (1) Detailed Instructions Notes: If you assemble the product correctly and use the wax inside to reduce the friction between wood board properly, the clock will run for 1-3 hours.