4WD Mobile Robot with Tracking and Avoidance System-ALSRobotBase 4WD Mobile Robot Kit with Light Tracking System was produced by Harbin Alseon Robotics Technology Co., Ltd.. It is designed according to the control subject of previous Undergraduate Electronic Competition. 4WD Mobile Robot Kit has the light tracking senseor so that it can follow light to move.This 4WD Mobile Robot Kit also have Mini IR Detector sensor module, the module is a distance adjustable sensor. It has high adaptability to ambient light with high accuracy. It comes with transmitter and receiver. this module help mobile car detect obstacles and avoid easily. Specification: 1. Item Name: 4WD Mobile Robot Kit with Line Tracking and Avoidance System 2. Item Number: RB-13K074 3. Package Weight: 1.5 kg 4. 4WD Mobile Robot Kit Size: 206 mm x 200 mm x 65 mm Packing List: 1.1 x 4WD Aluminum Mobile Robot Car Chassis 2.1 x CarDuino UNO R3 Microcontroller 3.1 x Sensor Shield V5.0 for CarDuino UNO R3 Controller 4. 1 x L298 Dual H-Bridge Motor Driver 5. 5 x Mini IR Line Tracking Sensor 6. 3 x Mini IR Detector Photoelectric Sensor 7. 10 x 3Pin Jumper Wire 8. 1 x 10 sets M3 * 10 Nylon Standoffs 9. 1 x 10 sets M3 * 20 Nylon Standoffs 10. 1 x 10 sets M3 *8 Mounting Screws 11. 1 x USB Cable A-B for CarDuino Controller 12. 2 x Power Cable