1) Twin Cooling System ·The refrigerator and the freezer have two evaporators. Given this independent system, the freezer and the refrigerator are cooled individually as required and are, therefore, more efficient. Food odor from the refrigerator does not affect food in the freezer due to separate air flow circulation. 2) Multi-Flow System ·Cool air circulates through multiple vents on every shelf level. This provides even distribution of cooling inside cabinets to keep your food fresh longer. 3) Xtra Space TM ·Vertical room next to the ice maker in the freezer provides space for pizza etc. 4) Door Alarm ·Beep sound reminds you the door is open. 5) Xtra FreshTM ·Optimized humidity control keeps vegetables & fruits fresh. 6) Deodorizer ·Reusable twin deodorizers keep the refrigerator air fresh and odor free. 7) CoolSelect ZoneTM Drawer(RS2555, RS2577) ·User can select Quick Cool, Thaw and Select buttons for quickly chill, thaw and cool items. Select Soft freeze,Chill, and Cool to control the temperature of the drawer.