The Vevor deionized water system is designed for the final rinse stage of car washing to help deliver a spotless, air-dried finish without wiping. Its 5L mixed-bed resin removes calcium, magnesium, and other dissolved ions that cause water spots. The system can purify up to 200 gallons of water under average 200 ppm conditions and includes a TDS meter for checking water quality. It is suitable for cleaning cars, RVs, motorcycles, windows, and solar panels. A portable handle, refillable filter tank, and US and EU standard connectors make it convenient for regular use.