1.Simple mechanical structure, easy to install. 2.The two deceleration dc motors turn flexibly and have good directivity. 3.The chassis is and stable and easy to expand. 4.Car tracking, infrared obstacle avoidance car, car , object tracking function. 1. Product Name: Obstacle Avoidance Tracking Kit Intelligent Operating 2. Voltage: DC 6V 3. The motor voltage: 3-6v 4. Product assembled size: about 17.5x12cm Function: 1.The range of infrared tracking module to realize intelligent tracking(go black or white) 2.The two pairs of infrared reflections in front of the front can realize intelligent collision avoidance (obstacle avoidance) function and robot . 3.The on-board obstacle avoidance processing chip makes the obstacle avoidance distance farther. 4.The intelligent root object tracking functiong is realized by the two pairs of infrared reflectiong probes in front and right Colour:black Material:plastic+metal Package Contents: 1x Smart Car DIY Kit Note: Without 4xAA battery Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.