SUL181h SYN161a Mechanical Timer is suit for water heater, Water dispensers, Street lamp, Staircase lamp, Advertising lamp boxes, Breed aquatics, Irrigate, Office power auto control, in anywhere need time control in civilian, home or industrial, etc. it can setting 8 programs to control ON and OFF of electric appliance in 24 hours or setting 48 programs in one week. It can be programmed to avoid the peak of power, and it can distribute power in time limit to saving energy. This timer is a kinds of module for DIN guide rail, it is easy to installation in distribute box, and its so compact size with pretty form.. its time base component is adopt synch pulse motor and it is strong anti-jamming with performance stabilization. Feature: 1) Synchronousmotor drive or quartz clock with approx three days power reserve 2) Twenty four h segment switching dial. 3) Programmable every thirtymin. 4) Change over contacts 5) Fine clock setting 6) Switching preselection 7) Permanent On and Off switch 8) Standard time adjustment with the clocks twodirectional fineset function 9) Operation indicator 10) Captive hinged cover, can be sealed 11) Captive terminal screws. 12) Din rail fixing 13) Packaging: Cardboard case