The Beseler Digi-Timer is a popular choice for a darkroom timer. Its solid metal chassis contains a reliable and easy to use system.
Two large buttons for "Focus" and "Expose", as well as two comfortable "Up/Down" buttons make setting this timer quite simple. The LCD window is bright.
The internal metronome "beeps" once a second or can be turned off. It has a "10x" switch which allows rapid transition between full and tenths of seconds.
This timer, containing two grounded AC outlets, will automatically turn the safelight off during exposure and turn it on when the cycle is completed.