Xcellent Global Magnetic Kitchen Timer with Whiteboard Personal Alert Reminder HG088 Contain with one timer, one pen with built in day eraser, manual; easy to install with the strong magnet or bracket Times up-to 4 events at the same time; each event has its own unique tone and lasts up-to 23 hours, 59 minutes. The sound is loud and long enough so that you won't worry missing anything in your schedule Adapts to the project at hand by counting up or down; Adjust to zero by just pressing the "HR" and "MIN" button at the same time Perfect for restaurant, classroom, kitchen, testing, cooker,chef,students and so on.