35 oz. quick change solution bottle. No need to remove backpack to refill, bottle change conveniently on your belt. Lightweight backpack 9.9 lbs. Commercial grade high pressure pump 8-10 bar. Battery weight supported by your waist using comfortable belt. Belt holster to store Storm wand. Battery backpack system, no trailing cable, fully mobile. 1 hour 50 minutes continuous runtime. Quick change battery if longer runtime required.