<p>1. Using high-quality materials, the quality is guaranteed.</p> <p>2. Ultrasonic distance measurement and obstacle avoidance, automatically rotate or back to avoid obstacles when encountering obstacles.</p> <p>3. The digital tube displays the current obstacle distance in real time, up to 5 meters.</p> <p>4. Introduce a new simulation design concept to make the circuit board more like a car chassis, a dedicated motor drive chip, control the forward and reverse rotation of the motor, and flexibly control the car's forward, backward, in- rotation and other actions; the STC single-chip control system is closer to the people.</p> <p>5. A wide range of applications, training hands-on ability.</p> <p>Working voltage:5V</p> <p>Power supply mode:4 x AAA batteries (not included in the delivery)</p> <p>Working current:no-load less than 300mA (the motors are working but not walking)</p> <p>The universal wheel version reduces the walking resistance of the car, saves power and lasts longer If you purchase loose parts, you need a certain welding foundation and patience, and you need to bring your own welding tools.</p> <p>Attention:</p> <p>1. This product is a DIY kit and not the final product.</p> <p>2. This welding project requires basic electronic knowledge and hands-on skills.</p> <p>3. The delivery is in loose parts, which need to be welded and assembled by yourself. Some accessories are sent randomly and cannot be specified, which will not affect the use.</p> <p>Colour:As Shown</p> <p>Material:Plastic</p> <p>Package Contents:</p> <p>1 * DIY trolley welding kit</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>