This LEGO® Technic™ Small Hub set provides an advanced way to bring your models to life. With Bluetooth connectivity and 2 input/output ports, this small hub can control and combine Technic motors, sensors, and other LEGO elements for fun and interactive builds. In addition, the hub features a rechargeable battery with a micro USB charging and connection port, as well as a 6-axis gyro. Whether you're a beginner builder or an experienced user, the Small Hub is essential for creating exciting models with the help of the free SPIKE™ App for tablets and computers.