This is one of the best little concentrate sprayers on the market. It is capable of injecting as little as 1 teaspoon per gallon to as much as 8 ounces per gallon into the water flow. Simply click the dial to the recommended rate per gallon and spray. Each notch clearly lists the amount being injected per gallon in teaspoons, tablespoons, and ounces so there is no confusion regardless of how the product label reads.