PCS misting hydration backpack comes with the personal cooling system unit fullyinstalled! 2-n-1 drinking and misting from the same hydration pack system. Right out of the boxthe PCS unit comes with a rechargeable battery, 8-speed wireless remote control for mistdensity, and an extra 0.20mm mist nozzle (0.15mm mist nozzle comes standard with eachbackpack). The PCS unit can also be used with our waist Pack attachment that zips to thebackpack itself. This eliminates the need to carry a separate water bottle. The cooling packsystem is designed for easy removal and reinstallation, so it can also be used out of the pack fora variety of cooling applications and can be further enhanced by adding our quad hose, nozzlekit.