Feature: 1. 0.01 um Filtration fineness, suitable for outdoor use, applicable for hiking, camping and other activities. 2. Four‑layer filter straw design, can filter water impurities, make the water comfortable and safe drinking. 3. UF membrane filter elements, remove large particles, residual sediment, rust and small impurities. 4. Retaining beneficial mineral elements after filtering the harmful substance in water, practical and wonderful accessory. 5. 2000ml of the capacity, powered by 4pcs LR41 button battery (not included), high efficiency and convenient to use. Specification: Item Type: Water Filter Hand Pump Material: ABS Filter Fineness: 0.01um Battery: 4pcs button batteries (Not included) Battery Model: LR41 Capacity: 2000ml Usage: 1. Connect the inlet hose to the inlet clamp, making sure the filter is connected to the other end of the inlet hose. 2. Connect the outlet hose to the outlet clamp and ensure that the other end of the water outlet hose is emptied into a cup/bottle or other clean container. 3. Immerse the pre-filter filter completely in the water to be filtered. Use a float to keep the filter away from mud or sediment. 4. When the container is filled with purified water or meets your needs, rotate the filter elements nut counterclockwise to remove residual water from the housing. 5. Rinse the filter elements with pure water, remove the filter head from the original water, keep the filter shell upside down, and continuously pull the handle 3 times to ensure that the water in the filter shell is discharged. Dry the filter elements, reinstall the filter elements clockwise and tighten the nuts. 6. Remove and dry hose.Tie the hose neatly and put it into the box together with the water purifier.You can also wrap the intake hose around the housing and store it in a storage bag.. Package List: 1 x Water Filter Hand Pump1 x Storage Bag 1 x Water Inlet Long Pipe 1 x Water Outlet Short Pipe 1 x Manual