The digital display will show TDS of water and room temperature on the display And will tell the command what is working

Aqua Queen RO Water Purifier Hot Cold Normal

Purification stages:
1st stage: Sediment Removal Cartridge
Function: Polypropylene filter for removal sands, silt, dirt and rust particles, Major series of high efficiency, low pressure drop, special liquid filtering cartridge.
Character: This material meets F.D.A specification and carefully constructs to avoid potential contaminants.
Caution: Maximum water temperature 65 °C.

2nd Stage: Granular Carbon Cartridge
Function: Remove residual air pesticide, impurities, chlorine, stink, peculiar air, color, other harmful chemical toxicant then sweeten the quality of water.
Character: To keep your filter system operation efficiently, replace, this cartridge annually or by the recommendation of your experienced water conditioning dealer.

3rd Stage: Carbon Block Cartridge
Function: Remove chlorine, surplus organic compounds and gases causing odor from water, protect RO membranes from clogging residues
Specifications:
Compositions: Coal, De chlorination material
Usage Time: 12 months (10,000L)
Max flow: 100L/H
Use Pressure: 5 bars

4th Stage: Reverse Osmosis Membrane
‘Toray’ Membrane sheet from Korea

5th Stage: Post Carbon Filter
Features: Test and Oder, the water before drinking as an added assurance that your water will be crystal clear.
Specification:
Life Time: 2500 gpd
Flow Rate: 0.5 gpm/min
Max Pressure: 125 psi
Temperature: 5-45 °C.