Power supply:
On the back is the battery compartment, the timer is powered by 2 AAA batteries, with me they were not contrary to the product supplied.
Timer functions:
The timer / stopwatch goes to 99h 59min 59sec. Both timers can operate separately. An arrow on the display indicates whether the time up (stopwatch) or down (Timer) runs.
If you have the timer function on, every few seconds a green light to the Timer button lights up.
About one minute: approximately every 3-4 seconds
Under a Minute: approximately every 2 seconds
Under 10s: every second
Expires the clock, the timer button will turn red and count the time from the end of the alarm up.
After stopping the time, the timer will automatically return to the last set time.
The timer has a memory function, press the M button long, you can storing a time and confirm by pressing. Later, you can call this time by pressing the M button again.
The other operation is nachlesbar easy and possibly also in the manual, so I no longer write to it.
Alarm Signal:
A slider is located on the side which allows you to set the alarm. You have the possibility between silent, soft and loud to choose.
All in all, the timer all what I expected, unlike many others, he can count on the 99min beyond what was important to me, as well as the AAA batteries that are better than button cells.
I would highly recommend this timer.