The Serta Raised Queen Pillow Top with Never Flat™ technology makes getting into and out of bed easier and feels like a real mattress, making it comfortable to sleep on night after night. Able to maintain it"s pressure throughout the night, Never Flat™ elimates sagging and loss of air pressure that is so common in airbeds. Never Flat™ technology is an auto-engaging, whisper quiet pump that maintains constant air pressure throughout the night for an undisturbed, continuous night"s rest that is never flat. Choose your desired comfort level--Plush, Medium, or Firm--and let the powerful Primary Pump inflate the bed. Once inflated, the Secondary Pump continusly monitors and senses when it needs to silently engage in order to maintain the chosen comfort level throughout the night. *The powerful, integrated primary pump enables effortless inflation and deflation of the air bed. *The automatic shut-off feature turns the Primary Pump once the bed is fully inflated or deflated, allowing you to turn on the pump and walk away without worrying about the pump getted burned out. *Clear dial settings for plush, medium, and firm allow for preferred personal mattress comfort levels. *Pressure sensing technology constantly monitors and adjusts to match the chosen mattress comfort level. *Pump silently, as neccessary, engages throughout the night creating a consistently comfortable feel. *35 circular coils create a comfortable sleeping surface while vertical and horizontal reinforcements allow bed to maintain shape. *Removable pillow top cover feels like a real mattress. *Carry bag included. Guaranteed to stay inflated all night!