ELECFREAKS micro:bit Smart Cutebot Pro Robot Car Kit is a programming robot for STEAM education, it equips with a 4-way infrared line-following sensor, an encoder motor, the LED rainbow light, an ultrasonic sensor, and other devices. With the encoder motors, the Cutebot Pro provides the flexibility to control the distance the cart travels and enables more precise control of the turning angle. The Cutebot Pro also offers a variety of expansion interfaces to allow for the expansion of additional hardware to stimulate your child's imagination and creativity.