• Functional Aircraft Engine Model: This engine model kit that works features bidirectional propeller rotation with push-button control and simulated movement effects for builders age 14
• Adjustable Motorized System: Includes battery box and motor with 3-speed gear selection allowing adjustable speed settings making this engine model kits for adults truly interactive
• STEM Building Experience: The 2256 piece engine model kit that runs develops engineering skills through assembly while producing engine sound effects when operational
• Complete Building Package: Contains detailed color manuals in protective packaging assembled model measures 41.6×25.4×23.5cm (16.4×10×9.3in) for display 
• Premium Aviation Model: This Mould King engine compatible aircraft set features authentic mechanics and delivers rewarding building experience for aviation enthusiasts