Specifications: Product name: Bicycle belt drive Packing: CPE sealed frosted bag (with instructions) Product material: wood, plastic Product packaging size: 22*15*0.3CM Finished size: 14.2*10.2*5.5CM Product board weight: 112.9G Product accessories weight: 27.8G How to use: see the manual (with electronic manual for easy projection) Level Difficulty:★★☆☆☆