*Note: This kit requires 2 x 18650 LiPo Batteries and a charger. 1. This product is a smart car developed based on UNOR3, with BT remote control function, Mecanum Wheels allow Omni-directional movement and ultrasonic obstacle avoidance function. 2. There are mainly four modules, n￢amely: main control module, a motor driver module, BT wireless module, and ultrasonic sensor module. 3. This product adopts a solder-free installation design. The components are fixed by copper pillars and screws, and the circuit connection between each electronic module is connected by DuPont wire, which is simple and convenient. Features 1. The main control board adopts CH340 UNO R3 development board. 2. The motor drive module uses the L293D module to drive the DC motors. 3. The BT wireless module is connected to the module through the mobile phone APP and sends control commands to realize the motion control of the smart car. 4. The ultrasonic sensor module uses the HC-SR04 module, which uses the ultrasonic ranging to measure the distance for obstacle avoidance. 5. This kit has a strong Aluminum chassis. 6. The Mecanum wheel is used as the wheel to enable the car to move sideways like a crab. Kit parts: Microprocessor CH340G UNOR3 InputBT wireless module MotorDC geared motor Motor drive L293D module Input Ultrasonic module (HC-SR04)