1.The high-quality 2.air pump is characterized by its low noise 3., long life ... Features:1. Jet propelled air mattress consists of (130×2) block-like cushions, which operates on two sections of ... arranged in intervals at each row (1,3,5…2,4,6…) in an alternating inflation. It can lighten ... prevent from bedsore effectively.4. The high-quality air pump is characterized by its low noise, long life and ...