Features: The intelligent D25 Tracking Car Kit features automatic line following capability with precise infrate sensorings. Ensuring accurate navigation on various pattern for seamlessly robotics experimentation,programming flexibility. This DIY tracking car supports customizable for educational projects and STEM learning. Ideal for electronics hobbyists, STEM educators, and students exploring robotics fundamental, this kit bridging hands on learning with real sensoring applications. Easy assembly with snap together components, this auto guided car kit includes intuitived tutorials for immediate operation across skill level, from beginner to advanced coders. Specifications: Item：intelligent D25 Tracking Car Material: Plastic+Metal Size: about 7.2x10.50cm/2.83x4.13in Supply voltages: 3Voltages (the kit not contain batteries, you can buy 2AA batteries) Board size: about 7.2x10.50cm Main control chip: LM393 voltages comparator chip, no programming control Note: It is loose part. need to assemble it yourself Package Includes: 1PC D25 Tracking Car Part note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution