Main business:Arduino learning kitArduino robotArduino development boardSensor ModuleElectronic componentsProvide customization, agency and wholesale services!Welcome to consult and cooperate, we can give you a more favorable price!Note: This kit uses 18650 batteries(2 pieces), but we cant any batteries by air, so kindly remind customers to prepare before receiving the kitComponent List:1pcs LAFVIN UNO R31pcs USB cable1pcs V5.0 extension board 1pcs L298N motor driver board 1pcs Ultrasonic Sensor1pcs Ultrasonic holder1pcs Servo motor1pcs Servo motor fixed plate1pcs Bluetooth module3pcs Line tracking module4pcs Motor4pcs Wheel1pcs Remote1pcs IR Receiver Module 1pcs Cell box1pcs Black tape2pcs Acrylic plates5bag Screws and nuts for every part1pcs 40pin F-F dupont wire1pcs Screwdriver4pcs Bunding belt1pcs CD with tutorial