4-gallon tank has the capacity to go farther between refills. Manual hand-operated, no-leak internal piston pump generates a flow rate of up to 0.3 oz. per minute. Deluxe harness has wide, padded shoulder straps that fit comfortably across the torso and curve to the contour of the user's body. Adjustable hip harness assists with weight distribution, relieving burden from the user's shoulders. Delivers up to 35ft. spray height.