The mattress is continuously alternately inflated and ventilated through the double pipes, so that the spherical airbags fluctuate stably and alternately, constantly changing the contact point between the human body and the mattress, effectively avoidingcontinuous pressure on the skin, promoting blood circulation, and preventing the occurrence of bedsores. Features:Mattress head and tail lengthened design, prevents mattress from sliding.Double air nozzle design, seamless and airtight.One-piece massage, 135 spherical airbags are evenly stressed.Made of premium PVC material, skin-friendly and breathable,keep skin dry. Low noise air pump, energy-saving and high-efficient, air pressure adjustment button.The mattress is integrally formed, firm and reliable, with good sealing performance and no air leakage.Specifications:Material: PVC 3PLYPlug Type: 3 types (optional)Thickness:0.3-0.4mmNumber of Bubbles: 135PcsWork Load: 135KgVoltage: AC220VFrequency: 50HzInput Power: 7WPressure Range: 0-15Kpa (0-115mmhg)Air Pump Inflation Volume: 5L/minExchange Time: 12 10% minutesRelative Humidity: 80%Relative Temperature: 5~40Noise:50dBMattress Size: 1930 * 880 * 60mm / 75.98 * 34.65 * 2.36inAir Pump Size: 185 * 110 * 85mm / 7.28 * 4.33 * 3.35inPackage Weight: 2900g / 102.29ouncesPackage Size: 280 * 195 * 165mm / 11.02 * 7.68 * 6.5inNote:There are 3 kinds of plug types for yourchoice, please choose one suitable for your country.Package list:1 * Anti-decubitus Mattress1 * Air Pump3 * Plug Cable