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The Weathermatic SLM4 4-Zone Module is only to be used with the SL1600 SmartLine Controller.
SMARTLINE controllers each represent the richest feature set in their respective class. By adding an SLW Series On-Site Weather Station; a SmartLine controller enters a class of its own. It has been said; "You buy the product only once; but you buy the water every month." This fact alone is a great reason to invest in SmartLine. With no service provider dependence; no recurring maintenance; and no user fees; SmartLine pays dividends on your one-time investment every single month.
SmartLine controllers and SLW Series On-Site Weather Stations deliver an excellent ROI (Return On Investment) through a patented water saving process (U.S. Patent No. 6;314;340).