Intermatic Master Control Timer D-811 Two Prong Check
Feb 19, 2019
Usable, but far from perfect
There are 24 on-off trippers built into the timer.
I like that all the trippers are built into the timer - unlike timers that come with only 4 removable trippers.
The trippers are hard to flip: they have a lot of resistance to moving and are small, so you might need to use a screwdriver - not very user friendly.
Also, the trippers must go through an on-off cycle to perform a switch. For example, if you have the trippers from 9PM to 9AM all set to off and you manually switch the timer on at 10PM, it won't turn off all night - not until it first hits an on tripper. There's a work-around to alternate long runs with trippers that are midway between on and off. The in between trippers will reset the timer so that the next tripper can perform its function.