FlowZone Shower 4-Gallon Multi-Use Continuous-Pressure Backpack & Rolling Lithium-Ion Sprayer ELIMINATE MANUAL PUMPING: Dump the Pump&trade; with a lithium-ion battery and 45 minutes of continuous spraying. CONTINUOUS PRESSURE: maintain constant tank pressure and spray with consistency - no pumping required. 15 FT. SPRAY DISTANCE: spray up to 15 feet with a consistent pressure of 45 psi. 2x FASTER: spray more than 7 gallons per battery charge to get your project done faster. 2 NOZZLE ATTACHMENTS: select either the adjustable short nozzle (cone -&gt; jet) or the 18" extension wand (mist) to meet the demand of any project.