The A1Pro has two exercise modes: M, for manual operation, and A, for automatic operation. As a beginner, you can use the remote control in manual mode, which allows you to start, accelerate, decelerate, and stop. As an experienced user, you can use the automatic mode where the speed is adjusted through an algorithm and allows you to adjust the walking speed by changing the pace of your steps. When you are in the front area, it starts and accelerates, in the middle area it maintains a steady speed, and in the back area it will decelerate and then stop automatically.