Muller mr28 10pro din rail mount digital timer 230vac 16a 250v muller mr2810pro p the muller mr28 10pro is a din rail mount 1 channel digital timer with 20 functions the four basic functions are pulse wiping delayed and clock generating it has an adjustable time range from 0 1 seconds to 999 hours with the shortest switching interval being 0 1 second the high resolution lcd screen is clear and easy to read with three lines showing text menu zero voltage and security query adjustable