For about 4,000 liters of water and the removal of almost all bacteria (99.9999 percent) and unicellular parasites (99.9 percent) including Giardia, which contaminate the water. The filter also reduces turbidity and removes all particles larger than 0.2 microns. The filter is chemical free and requires no power, batteries or spare parts. Compatible with LifeStraw Go & Universal. Contains an activated carbon capsule.