There are four independent timers in one here, and a precise, digital clock that deviates by less than a second per day. I have been on the look-out for something like this.You may set one timer to alert you in, say, one hour, number two in, say 5 hours, and so on, and then start the countdown. It is easy to switch to and from among the timers on the display screen to check or adjust the settings, for example. They operate independently, and each timer has its own sounding:Timer 1 has one beep per second, timer 2 has two quicker beeps per second. Timer 3 has tree quick beeps per second, and timer 4 has four quick beeps in one-second intervals. By this the user has the means to hear which timer it is that signals off. And that that is an asset to me.The timer works very well for preparing remedies at fixed or preset intervals throughout the day. The alarm beeps are of "medium strength" I would say, and they persist for long until one turns the sounding timer off. This function is a saving "angel" at times, and at other times I can see how long it has sounded, for it keeps a count of that too.The four timers (memories) are very easy to set and reset. You press a button to set a timer - up to 99 hours, 60 minute and 60 second as the case may be. Not all timers may be set 99 hours and 59 minutes ahead.You either click off by thumbing or something, or press the button down. In that case there is a little switch, and "the minutes fly" one by one, at a much convenient speed. Setting the timers is, thankfully, not noisy. Other timers sound "beep" for every change, but not this one.It is a timer that delivers four independent "beep"-signals, that allows for minor "beep-beep" artistry, for example in the kitchen where timing is important in many cases. As for its magnet and how it works, I can't tell very well. I use it in a tilted position.There is more to say about the item too, but not by me here. The timers I have bought functions adequately so far. Some time ago I bought three and am glad I did.