This Demineralizer will treat approximately 650 gallons of potable tap water containing 10 grains of Total Dissolved Solids (TDS). This DI does not include a TDS Meter; if you want the meter look at ASINB0951DZW6B. The DI under this ASIN DI comes with 0.5 cubic feet of high-quality regenerated Mixed Cation - Anion ion-exchange resin capable of providing a spotless rinse or just a good cup of coffee. All wetted materials are National Sanitation Foundation (NSF) approved and can be used on drinking water systems. Replacement Virgin Mixed Bed resin is available from the manufacturer, contact us for pricing. The system does not include a quality light. Please check with the seller if a light is required. Technical, you receive One (1) 9” diameter by 18” tall or 10" diameter by 17" tall (depends on vendor availability fiberglass reinforced plastic tank. One (1) tank head with ¾” inlet and outlet. One (1) distributor tube. One (1) 3/4" Female nylon garden hose style fitting, Inlet Side of Tank head. One (1) 3/4" male nylon garden hose style fitting, Outlet Side of tank head. 0.5 cubic foot of highly charged ion-exchange resin capable of removing 99.9 percent of the dissolved solids in your home water. The Mobile Spot Free unit will come with a 304SS caring handle. Instruction for use. Boxed for shipping. Operating weight, with water, is 50 pounds