This device meets these requirements and offers even more, including:
2 independent countdown timer (to me would have been a single handed, but sometimes it's really convenient to run two times at the same time).
It is handy that runs after the set time to zero and the alarm sounds, the time forward and the time after the alarm measures. Should the alarm ever overhear (which is difficult, because it is loud enough), you can see immediately how long it's been over time.
For a digital kitchen timer, I decided, because I have never seen a classical mechanical, whose movement does not at some point in time was inaccurate (or even from the very beginning was) ran and faster or slower, or even stuck and one in saw truth always parallel to a clock to be sure. At such a point the kitchen timer is useless.
With a digital alarm clock should not happen. Either it goes exactly - or he is completely broken.
Ah yes, important to me was the operation with a single AA battery (I use a rechargeable battery) instead of any button cells (which regularly end up in the garbage) or 2 batteries that such a small device in a hundred years not be empty at and before expire.
The only complaint: the magnet adheres very well indeed, but has come loose from the holder during runternehmen the alarm from the refrigerator. I have to glue again. Even the fold "stand" does not help the alarm clock to a stable state. With these limitations, I can live well, so given the many positive aspects but 5 star.