Natural tap water contains dirt, rust and other bacteria that may be harmful to your health. Introducing the PRIME X3, CUCKOO’s newly launched Outdoor Water Filter that will provide you with CLEAN water always through 3 revolutionary ways: Re-engineered PVDF 2.0 Ultra-Filtration Membrane, Automated Flushing System and PRIME-X Flush System. Not only that, it is also equipped with the Royal Out-to-In Filtration System that will leave contaminants on the outer layer while it filters water more effe