The advanced yet simple-to-use LEGO® Technic™ Small Hub combines and controls LEGO Technic motors, sensors, and other LEGO elements to create fun, interactive models. With 2 input/output ports, Bluetooth connectivity, 6-axis gyro, and a rechargeable battery with micro USB charging and connection port, the Small Hub is at the heart of any SPIKE™ Essential model. Features 2 I/O ports, Bluetooth connectivity, 6-axis gyro, and a rechargeable lithium-ion battery with micro USB charging and connection port. For use with LEGO® Technic™ motors and sensors. Take control of your Small Hub with the free SPIKE™ App for tablets and computers.