This robot is developed based on ESP8266 , with WiFi remote control function and ultrasonic obstacle avoidance function.There are mainly 4 modules: ESP8266 controller, L9110S motor driver module, ultrasonic sensor module and SG90 servo.Through the ultrasonic sensor ranging, encountered obstacles, automatic planning of driving route.This product adopts the welding free installation design, the parts are fixed by the copper column and the screw structure,the circuit connection between each electronic module is connected by the line, simple and convenient.Colour:picture colorMaterial:plasticPackage Contents:1 x Smart Wifi Robot Car Kit1 x English Instruction ManualOnly 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.