The new remote control ultrasonic ranging smart car is the upgraded version of two-generation ultrasound the major upgrade is: 1. Changed the car chassis aside speed function 2. Updates the main control panel with a new generation of UNO controller more stable performance. 3.Optimized film clip fixation more stable. 4. Provide installation diagram for car chassis installation. Specification: 1.The motor specification: voltage range:1.5~12V the motor shaft length: 10mm speed 6.0V 100rpm/min. 2. Control motor selection L298N driver module microcontroller real isolation. 3. Avoidance part is HC-SR04 ultrasonic stable performance measure the distance accurately. 4. Display section use 1602 I2C modules only use two IO ports. 5. Remote control uses infrared remote control mode NEC protocol. 6. Can access the external voltage 7 ~ 12V. And can be equipped with a variety of sensor modules to achieve a variety of functions depending on your imagination.