• plastic and metal
• be used to measure distance, speed,DIY car
• Warm tip: dear buyer, due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item sincerely hope that you can understand! thank you!, car, car
• DIY smart car--this car is the tachometer encoder,Smart Car
• Car compatible for--two on battery compartment, convenient power throughout the system in a , while starting and stopping no add- is very convenient, the entire system highly integrated,Smart Car
• Obstacle avoidance car--mechanical structure is simple, it is easy to install,Smart Car