easy to use you press min dry to reset, you tap Min to indicate the time you need, the time remains in memory so you can re-route the same time if you wish. Very good ringtone that means another room or outside that you can stop by pressing stop, this machine has been placed with me on my hood because magnetized. It does not take place and go into any interior. Nothing works great, I am very happy with my purchase because fully functional and easy to use.