Laser Cutting 3d Mechanical Model - Wooden Puzzle Game Assembly Toy

Features: 
Dynamic simulation of full mechanical gear transmission.
Each model design collects physical 3D data, computer dynamic simulation.
Countless sports plans to do all the details to restore.
No battery, accurate time, minutely, and explore the mystery of watch structure.
Precise control, smooth assembly.
Based on the classical mechanic's Newton's E-law clockwork and clockwork hooks provide energy to complete the power output without battery, one winding can accurately run for 4 hours.
Specifications:
Material: wood
Size: 234*117*346mm
Applicable age: 14 years old
Package Included:
1 * Wooden Puzzle

WARRANTY

We'll refund your money if the item hasn't been delivered within 40 days after purchase. You have 2 weeks to request a refund — until day 60.
Product doesn't match the description? Contact us within 30 days after you receive it!
In case of cancellation, money will be refunded to your account within 3 days.