This is a self-building programmable code smart car kit with an ATMEGA328P chip for Arduino UNO R3 Circuit Board. It is designed for the starter who are using learning and programming lessons or DIY electronic programmable kit lovers. We have the manual and program code to provide to you.There are two functions after you flash our code into the board. Function 1: Ultrasonic obstacle avoidance function. Function 2: Line-following functionThere are mainly four modules:1. Infrared signal detection module2. Main control module3. Motor drive module4. Ultrasonic sensor moduleThe smart car adopts a welding-free installation designThe components are fixed by copper pillars and screwsThe circuit connection between each module is connected by DuPont wire, which is simple and convenientNOTE: It is used the 18650 3.7V battery and the kit doesn't contain batteries. Please place your order carefully.color:Photo colorMaterial:Metal+ABSPackage Contents:1 x For Arduino Car Programming Kit1 x English manualOnly the above package content, other products are not included.Note: Light shooting 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.