Ice Chamber, AutoSwing Louvers For 4 Way Air Deflection, Water Drain Plug For Easy Cleaning, 5 Castor Wheels For Easy Mobility, Motorize Louver Movement, Rust Free And Easy To Wipe And Clean Auto Drain Switch: Water Can Be Drained Out Easily From Back By Simply Turning On The Auto Drain SwitchNair Throw Distance (Ft): 55 Large Opening On Top: It’S Unique Large Opening On Top Enables You To Clean The Water Distribution Tray And Blockages Thereby Increasing The Longevity Of The Product Extra Large Ice Chamber: Optimus Comes With Extra Large Ice Chamber Providing Maximum Cooling Comfort.