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DescriptionIntelligent car chassis car robot car chassis ideal for DIY. Comes with simple mechanical structure for easy installation. Can be used for distance measurement, velocity. Can use with other devices to realize function of tracing, obstacle avoidance, distance testing, speed testing, wireless remote control.Feature- Color: As shown- Material: plastic- Size: 20 x 14 x 3cmPackage Including1 x Car Chassis2 x Gear Motor(1: 48)2 x Car Tire2 x Speed Encoder2 x Fastener1 x Universal Wheel1 x Battery Box (battery is NOT included)