100% US manufactured solenoid with a stainless steel casing and Teflon coated internal plunger, tested to over 4,000,000 operations.Single, easy to replace Lithium Battery with 10-year shelf life.Fastest installations, thanks to its simple fully self-contained electronics, and set screw cover design. Delany has done away with the dreaded strap wrench! Factory pre-set range in order to ease installations SmartChoice Technology allows the Pulsar to be the only field adjustable flush valve on the market. Like a Delany manual valve True-in-the-Field Water Conservation can be achieved by allowing just a little more or a little less water, for circumstances where the water pressure, flow rates or fixtures are less than optimal.The Pulsar V2.0 makes saving water even more seamless. It decides for the user whether more water is needed with its automatic dual flush feature. Available in traditional chrome and designer matte black.