• Robot car chassis kit--this car is the tachometer encoder,robot kit
• Robot kit--can be used for distance measurement, ,robot car chassis kit
• Car chassis kit--can use with other devices to realize function of tracing, obstacle avoidance, distance testing, testing, ,robot car chassis kit
• Car chassis--with a 4 aa battery box and power (batteries not included),robot car chassis kit
• Robot chassis--mechanical structure is simple, it is easy to install,robot car chassis kit