Item Type: Smart Robot Car Chassis KitMaterial: PCBPower Supply: 4 x AA battery(not included) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1EASY INSTALLATION: Smart robot car come with simple mechanical structure, very convenient installation 2A VARIETY OF SYSTEMS: The car comes with 20 lines of tachometer code, with photoelectric gun shop can quickly form a gun system. Can be composed of speed, distance, closed loop system 3POWER SUPPLY AND SWITCH: Smart car is equipped with 4 battery compartments to facilitate the power supply of the whole system. At the same time with a switch, easy to start and stop the system 4GOOD INTEGRATION: No need for additional tools, very convenient, make the whole system highly integrated 5RELIABLE PCB: Adopt excellent PCB materials, with reliability and miniaturization, good maintenance and interchangeability