The most effective portable at any price. Effective against cryptosporidia, bacteria and viruses; unmatched in removing harmful chemicals. Increased purification capacity, more secure hose fittings for backwashing. "Direct Connect" to most water bottles and hydration packs, flexible sanitary cap directly attached to pump cover, longer tubing, rugged, comfortable handle, greater capacity and fastest flow of all. Self-cleaning prefilter and gravity assist system included. No iodine needed! Output: 1.8 qt/min. Cartridge capacity: 150 gal.