The most important function of a self-balancing scooter is (you guessed it!) remaining upright. In order to do this, microprocessors in the vehicle monitor the direction a rider is leaning. The gyroroscope, also connected to the microprocessors, helps gather information about the tilt of the board. Motors inside the board change power output to keep the rider balanced. Every self-balancing scooter is different, meaning that each one uses a different battery, set of microprocessors, and motors.