Variable Pressure: No gear limit! Dialing the knob between 8 psi to 116 psi depending on which you need, let the flow rate from drizzle to violent storm. Rotate the knob easily to select the satisfactory speed for your sprayer Exclusive Patented Technology: The first backpack sprayer with self-cleaning technology reduces the waste of raw materials effectively. Start the self-cleaning function in time to earn a longer service life for you Customer Oriented: ALIENTABI is a customer-centric brand. Before the sprayer is sent out, the factory will conduct a series of quality inspections on the machine, including a water leakage test, so some products will have residual water stains inside the box, which will not affect the use. If you receive the goods and think there is a problem, get back to us.