BCG Small Digital Darkroom Timer measures 5.2cm X 7cm an is perfect for darkroom use. It has a rather large, easy-to-read display measuring 3.8cm x 3cm.
It is very easy to use. Pushing both minute and second tabs at the same time zeroes the display. Push either minute or seconds to set the timer and then start or stop. It has a beeping alarm.
It can also be used as a stopwatch when zeroed and start is pushed.
A button magnet is on the back…see images.
It runs on one LR1130 battery, which is included, installed and easily changed.
The Brownie Camera Guy says:
I use a few of these digital timers in my darkroom. They are very convenient and super easy to use!