1. kit + smart car 2-in-1 This smart car is developed based on the TYPE-0NAN development board, equipped with the L9110s motor drive module, which can realize the ultrasonic obstacle avoidance function. In addition, the output interface of the L91105 motor drive module adopts terminal blocks, which is convenient for connecting motor. 2. for Powerful system The Powerful system smart car adopts a solderless installation design. Use copper posts and screws to fix the structure between the parts. The circuit connection between each module is simple and convenient with line connection. The trolley uses plastic wheels for operation. 3. The low-threshold smart car meets the needs of creativity, the enlightenment teacher on the road of programming Product Description: Normal working temperature Voltage drop standard size: 27.5 x 21 x 7cm Material: Plastic colour: black Package Contents: 1 set assembled car accessories 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.