Features: brand new and high quality Equipped with anti-collision tires, worry-free playing indoors and outdoors. Made of environmentally friendly ABS plastic, it is characterized by a cool body design and a bright surface. No matter what country, beach, grass or stairs, you can easily conquer. Driverless is now very popular. Based on this car chassis, you can know many AI knowledge, such as machine learning, ROS, deep learning, reinfored learning, and other robotics knowledege. Four full metal gear box motor traction, powerful, can be retracted, can turn left and turn right, and run smoothly and smoothly. The tracked chassis is unassembled, you need to get it done by yourself and enjoy the fun of DIY. Motor welding place is glued and fixed for easy reuse. Specifications: Material:Plastic Size:Approx.20.3x15.5x9.8cm/8x6.1x3.86in Voltage: 3-9v Motor Reduction Ratio: 48:1 Motor Cable Length: 15cm Track Width: 4.5cm Track Material: Hard Plastic Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package includes: 1 Set for Tank Chassis Parts