Hello, Supor's electric pressure cooker works well. If the trotters are cooked, they can be pressed for about half an hour. If you press them for too long, the meat is not delicious at all. For example, if you choose to stew chicken soup, the chicken pressed by the button will turn into minced meat, which is usually OK in 20 minutes. But the pig's trotters are hard, just press them a little, and it will take about half an hour.

Appointment means that you are not at home, but if you want to make soup, you must press the appointment button. The shortest (minimum) time is 2 hours, but the soup cooked by pressing the function key is delicious, but the meat is not delicious. I hope it helps you.