First enter the APP, click the Switch Baby option in the upper left corner, and then go to the next step. Second, after completing the above steps, click the red Add Baby option in the upper left corner, and then go to the next step. Then, after completing the above steps, fill in the relevant information according to the baby's name, name and birthday, click the Save option after filling in, and then go to the next step. 4. The monitor was successfully added.