The Airtronics MC36xx Series are multifunction timers with dipswitch settings, relay output and LED indicator. These timers are extremely versatile and offer extensive options. Some models have 9 single-setting timing modes and 2 dual-setting timing modes in a single unit. They offer time delays from 1 to 100 seconds or 1 to 100 minutes. The others offer 5 timing modes in a single unit with time delay settings from 0.1 second to 1023 minutes.