A complete portable solution for Window Cleaning. This backpack is capable of holding up to 22 Litres and comes with an integrated carry handle. Simply add pure water and you're ready to clean windows. This backpack is capable of working at 40-60psi and comes with a hoselock compatible female connector as standard. Integrated Carry Handle with Contoured Base & Rugged Straps 12V 12ah Battery & UK Charger included Diaphragm pump capable of working at 40-60psi Variable flow & full flow settings 6 Month Back to Base Warranty Includes Hozelock Compatible female coupling Just getting started, take a look at these backpack starter kits Not suitable for chemicals deemed corrosive.