Many fresh foods emit ethylene gas, a naturally-occurring compound that hastens food ripening and spoilage. Sub-Zero refrigerators come with an air purification system (based on technology developed by NASA) that scrubs the air of ethylene and odor every 20 minutes.Sub-Zero s microprocessor controls the interior temperature to within one degree of its setpoint. An advanced air seal around all four sides of the door prevents leaks while conserving energy.Split Climate(R) intelligent cooling systemSplit Climate(R) intelligent cooling system revolutionizes Sub-Zero s already-superior preservation capabilities, keeping food even fresher for longerClearSight(R) LED lighting systemClearSight(R) LED lighting system fully illuminates the interior and reduces shadows.Sleek Stainless AccentsSleek stainless accents trim the interior, matching the sophistication of the exteriorEasily Customize SettingsEasily customize settings-from lighting to humidity-with the tap of a finger via the conveniently accessible touch control panelNight ModeNight Mode optimizes the interior lighting based on the detected ambient light, reducing the brightness by 90% in dim environmentsFlip-Up Dairy CompartmentLift the base of the flip-up dairy compartment to store taller items on the shelf belowAdjustable Door ShelvesPosition adjustable door shelves at various heights to accommodate assorted itemsNano CoatingNano coating lines the perimeter of each glass shelf to create a hydrophobic barrier that helps contain spillsEasily Accessible NASA-Inspired Air Purification SystemThe easily accessible NASA-inspired air purification system scrubs the air of ethylene and odor every 20 minutesWi-Fi Enabled FeaturesWi-Fi enabled for convenient remote access using your mobile device or smart home systemIndustry-Leading WarrantySub-Zero offers an industry-leading full two-year warranty on appliances, along with a full five-year sealed system warrantyAccepts Custom PanelsAccepts custom panels for an integrated look within cabinetry or stainless-steel accessory panels and handles to match other Sub-Zero, Wolf, and Cove products* Refrigerator Specifications LED refrigerator lights 4 glass refrigerator shelves (3 adjustable; 1 stationary) 4 soft-close crisper drawers with adjustable dividers 5 door bins (3 adjustable; 2 stationary) 1 flip-up dairy compartment