ESP32 Cam & STM32 Smart Robot Car, Dual Mode Programming Robotic Kit. Manual control mode: you can manually control the direction of the front wheel, the speed gear of movement, mode switching, camera screen angle, light switch, and horn. Multi-function display: Auto Obstacle Avoidance Mode: it move forward automatically, and when it detects an obstacle in front of it, it avoid it automatically and continue to move forward. following mode: detecting the distance ahead by ultrasonic wave to follow the movement with or without the current set distance range. Infrared tracking mode: Infrared tracking detects black lines and move forward along the black lines. WiFi camera screen: Get the camera screen in real time through the APP. Different batches; different components or colors, but it does not affect the use NOTE: This robot is without batteries, and the battery type is 18650 3.7v. Colour:Black Material:Plastic + Metal + Electronic Components Package Contents: 4 x Robot Development Kit (the kit is not a finished product and needs to be assembled by yourself) 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.