This four wheel smart car chassis is built to provide an engaging and educational experience for beginners. Its flexible design supports tracing, obstacle avoidance, and distance detection when combined with other modules. The compact and sturdy plastic shell offers reliable performance while motivating users to and robotics through hands-on assembly and experimentation. Features -Color:Black -Material:Plastic -Size:25.00X15.00X0.20cm/9.82X5.89X0.08in -Easy for replacement: Designed with a highly integrated system, this chassis kit provides a simple mechanical structure that facilitates easy assembly and opens opportunities for various robotic projects -Multi-Functional Performance: Compatible with additional components to enable line tracking, obstacle detection, distance measurement, and remote control functions for versatile learning applications -Sturdy design: delivers stable handling and flexible turning through four gear motors, ensuring a platform -Beginner Friendly: Tailored to inspire young learners by delivering practical hands-on experience in robotics, allowing children engineering concepts with confidence -Compact and Lightweight: this chassis is lightweight and highly portable, making it convenient to transport and expand for educational use Package list: 4 x DC geared motors 4 x yellow wheels 40 x 20 line code plate 8 x fasteners 1 x 3D assembly drawing 1 set x screw nut copper post 2 x